ESQL: Remove historical features (elastic#116966)

Our friends working on cluster features are looking to remove the
infrastructure for historical features. In `main` all historical
features are always enabled because historical features weren't allowed
to support versions before 8.a_long_time_ago. All of ours are certainly
enabled for versions `main` is wire compatible with.

x-pack/plugin/esql/qa/testFixtures/src/main/resources/boolean.csv-spec

@@ -63,7 +63,6 @@ avg(salary):double | always_false:boolean
 
 
 in
-required_capability: mv_warn
 
 from employees | keep emp_no, is_rehired, still_hired | where is_rehired in (still_hired, true) | where is_rehired != still_hired;
 ignoreOrder:true

x-pack/plugin/esql/qa/testFixtures/src/main/resources/date.csv-spec

@@ -216,7 +216,6 @@ string:keyword                                          |datetime:date
 ;
 
 convertFromUnsignedLong
-required_capability: convert_warn
 
 row ul = [9223372036854775808, 520128000000] | eval dt = to_datetime(ul);
 warningRegex:Line 1:58: evaluation of \[to_datetime\(ul\)\] failed, treating result as null. Only first 20 failures recorded.

x-pack/plugin/esql/qa/testFixtures/src/main/resources/enrich.csv-spec

@@ -580,7 +580,6 @@ CPH             |  Copenhagen    |  POINT(12.5683 55.6761)  |  Denmark
 
 spatialEnrichmentGeoMatchStats#[skip:-8.13.99, reason:ENRICH extended in 8.14.0]
 required_capability: enrich_load
-required_capability: mv_warn
 
 FROM airports
 | ENRICH city_boundaries ON city_location WITH airport, region, city_boundary

x-pack/plugin/esql/qa/testFixtures/src/main/resources/floats.csv-spec

@@ -99,7 +99,6 @@ int:integer |dbl:double
 ;
 
 lessThanMultivalue
-required_capability: mv_warn
 
 from employees | where salary_change < 1 | keep emp_no, salary_change | sort emp_no | limit 5;
 warningRegex:evaluation of \[salary_change < 1\] failed, treating result as null. Only first 20 failures recorded.
@@ -115,7 +114,6 @@ emp_no:integer |salary_change:double
 ;
 
 greaterThanMultivalue
-required_capability: mv_warn
 
 from employees | where salary_change > 1 | keep emp_no, salary_change | sort emp_no | limit 5;
 warningRegex:evaluation of \[salary_change > 1\] failed, treating result as null. Only first 20 failures recorded.
@@ -131,7 +129,6 @@ emp_no:integer |salary_change:double
 ;
 
 equalToMultivalue
-required_capability: mv_warn
 
 from employees | where salary_change == 1.19 | keep emp_no, salary_change | sort emp_no;
 warning:Line 1:24: evaluation of [salary_change == 1.19] failed, treating result as null. Only first 20 failures recorded.
@@ -143,7 +140,6 @@ emp_no:integer |salary_change:double
 ;
 
 equalToOrEqualToMultivalue
-required_capability: mv_warn
 
 from employees | where salary_change == 1.19 or salary_change == 7.58 | keep emp_no, salary_change | sort emp_no;
 warning:Line 1:24: evaluation of [salary_change] failed, treating result as null. Only first 20 failures recorded.
@@ -156,7 +152,6 @@ emp_no:integer |salary_change:double
 ;
 
 inMultivalue
-required_capability: mv_warn
 
 from employees | where salary_change in (1.19, 7.58) | keep emp_no, salary_change | sort emp_no;
 warning:Line 1:24: evaluation of [salary_change in (1.19, 7.58)] failed, treating result as null. Only first 20 failures recorded.
@@ -169,7 +164,6 @@ emp_no:integer |salary_change:double
 ;
 
 notLessThanMultivalue
-required_capability: mv_warn
 
 from employees | where not(salary_change < 1) | keep emp_no, salary_change | sort emp_no | limit 5;
 warningRegex:evaluation of \[.*salary_change < 1.*\] failed, treating result as null. Only first 20 failures recorded.
@@ -185,7 +179,6 @@ emp_no:integer |salary_change:double
 ;
 
 notGreaterThanMultivalue
-required_capability: mv_warn
 
 from employees | where not(salary_change > 1) | keep emp_no, salary_change | sort emp_no | limit 5;
 warningRegex:evaluation of \[.*salary_change > 1.*\] failed, treating result as null. Only first 20 failures recorded.
@@ -201,7 +194,6 @@ emp_no:integer |salary_change:double
 ;
 
 notEqualToMultivalue
-required_capability: mv_warn
 
 from employees | where not(salary_change == 1.19) | keep emp_no, salary_change | sort emp_no | limit 5;
 warningRegex:evaluation of \[.*salary_change == 1.19.*\] failed, treating result as null. Only first 20 failures recorded.

x-pack/plugin/esql/qa/testFixtures/src/main/resources/ints.csv-spec

@@ -1,7 +1,6 @@
 // Integral types-specific tests
 
 inLongAndInt
-required_capability: mv_warn
 
 from employees | where avg_worked_seconds in (372957040, salary_change.long, 236703986) | where emp_no in (10017, emp_no - 1) | keep emp_no, avg_worked_seconds;
 warningRegex:evaluation of \[avg_worked_seconds in \(372957040, salary_change.long, 236703986\)\] failed, treating result as null. Only first 20 failures recorded.
@@ -68,7 +67,6 @@ long:long                    |ul:ul
 ;
 
 convertDoubleToUL
-required_capability: convert_warn
 
 row d = 123.4 | eval ul = to_ul(d), overflow = to_ul(1e20);
 warningRegex:Line 1:48: evaluation of \[to_ul\(1e20\)\] failed, treating result as null. Only first 20 failures recorded.
@@ -127,7 +125,6 @@ int:integer       |long:long
 ;
 
 convertULToLong
-required_capability: convert_warn
 
 row ul = [9223372036854775807, 9223372036854775808] | eval long = to_long(ul);
 warningRegex:Line 1:67: evaluation of \[to_long\(ul\)\] failed, treating result as null. Only first 20 failures recorded.
@@ -170,7 +167,6 @@ str1:keyword |str2:keyword |str3:keyword |long1:long  |long2:long |long3:long
 ;
 
 convertDoubleToLong
-required_capability: convert_warn
 
 row d = 123.4 | eval d2l = to_long(d), overflow = to_long(1e19);
 warningRegex:Line 1:51: evaluation of \[to_long\(1e19\)\] failed, treating result as null. Only first 20 failures recorded.
@@ -190,7 +186,6 @@ int:integer       |ii:integer
 ;
 
 convertLongToInt
-required_capability: convert_warn
 
 // tag::to_int-long[]
 ROW long = [5013792, 2147483647, 501379200000]
@@ -207,7 +202,6 @@ long:long                           |int:integer
 ;
 
 convertULToInt
-required_capability: convert_warn
 
 row ul = [2147483647, 9223372036854775808] | eval int = to_int(ul);
 warningRegex:Line 1:57: evaluation of \[to_int\(ul\)\] failed, treating result as null. Only first 20 failures recorded.
@@ -239,7 +233,6 @@ int_str:keyword  |int_dbl_str:keyword |is2i:integer|ids2i:integer
 ;
 
 convertStringToIntFail#[skip:-8.13.99, reason:warning changed in 8.14]
-required_capability: mv_warn
 
 row str1 = "2147483647.2", str2 = "2147483648", non = "no number" | eval i1 = to_integer(str1), i2 = to_integer(str2), noi = to_integer(non);
 warningRegex:Line 1:79: evaluation of \[to_integer\(str1\)\] failed, treating result as null. Only first 20 failures recorded.
@@ -254,7 +247,6 @@ str1:keyword   |str2:keyword   |non:keyword    |i1:integer     |i2:integer     |
 ;
 
 convertDoubleToInt
-required_capability: convert_warn
 
 row d = 123.4 | eval d2i = to_integer(d), overflow = to_integer(1e19);
 warningRegex:Line 1:54: evaluation of \[to_integer\(1e19\)\] failed, treating result as null. Only first 20 failures recorded.
@@ -265,7 +257,6 @@ d:double       |d2i:integer   |overflow:integer
 ;
 
 lessThanMultivalue
-required_capability: mv_warn
 
 from employees | where salary_change.int < 1 | keep emp_no, salary_change.int | sort emp_no | limit 5;
 warningRegex:evaluation of \[salary_change.int < 1\] failed, treating result as null. Only first 20 failures recorded.
@@ -281,7 +272,6 @@ emp_no:integer |salary_change.int:integer
 ;
 
 greaterThanMultivalue
-required_capability: mv_warn
 
 from employees | where salary_change.int > 1 | keep emp_no, salary_change.int | sort emp_no | limit 5;
 warningRegex:evaluation of \[salary_change.int > 1\] failed, treating result as null. Only first 20 failures recorded.
@@ -297,7 +287,6 @@ emp_no:integer |salary_change.int:integer
 ;
 
 equalToMultivalue
-required_capability: mv_warn
 
 from employees | where salary_change.int == 0 | keep emp_no, salary_change.int | sort emp_no;
 warningRegex:evaluation of \[salary_change.int == 0\] failed, treating result as null. Only first 20 failures recorded.
@@ -312,7 +301,6 @@ emp_no:integer |salary_change.int:integer
 ;
 
 equalToOrEqualToMultivalue
-required_capability: mv_warn
 
 from employees | where salary_change.int == 1 or salary_change.int == 8 | keep emp_no, salary_change.int | sort emp_no;
 warningRegex:evaluation of \[salary_change.int\] failed, treating result as null. Only first 20 failures recorded.
@@ -325,7 +313,6 @@ emp_no:integer |salary_change.int:integer
 ;
 
 inMultivalue
-required_capability: mv_warn
 
 from employees | where salary_change.int in (1, 7) | keep emp_no, salary_change.int | sort emp_no;
 warningRegex:evaluation of \[salary_change.int in \(1, 7\)\] failed, treating result as null. Only first 20 failures recorded.
@@ -338,7 +325,6 @@ emp_no:integer |salary_change.int:integer
 ;
 
 notLessThanMultivalue
-required_capability: mv_warn
 
 from employees | where not(salary_change.int < 1) | keep emp_no, salary_change.int | sort emp_no | limit 5;
 warningRegex:evaluation of \[.*salary_change.int < 1.*\] failed, treating result as null. Only first 20 failures recorded.
@@ -354,7 +340,6 @@ emp_no:integer |salary_change.int:integer
 ;
 
 notGreaterThanMultivalue
-required_capability: mv_warn
 
 from employees | where not(salary_change.int > 1) | keep emp_no, salary_change.int | sort emp_no | limit 5;
 warningRegex:evaluation of \[.*salary_change.int > 1.*\] failed, treating result as null. Only first 20 failures recorded.
@@ -370,7 +355,6 @@ emp_no:integer |salary_change.int:integer
 ;
 
 notEqualToMultivalue
-required_capability: mv_warn
 
 from employees | where not(salary_change.int == 1) | keep emp_no, salary_change.int | sort emp_no | limit 5;
 warningRegex:evaluation of \[.*salary_change.int == 1.*\] failed, treating result as null. Only first 20 failures recorded

x-pack/plugin/esql/qa/testFixtures/src/main/resources/ip.csv-spec

@@ -16,7 +16,6 @@ eth2           |epsilon        |[fe81::cae2:65ff:fece:feb9, fe82::cae2:65ff:fece
 ;
 
 equals
-required_capability: mv_warn
 
 from hosts | sort host, card | where ip0 == ip1 | keep card, host, ip0, ip1;
 warningRegex:evaluation of \[ip0 == ip1\] failed, treating result as null. Only first 20 failures recorded.
@@ -60,7 +59,6 @@ eth2           |epsilon        |[fe81::cae2:65ff:fece:feb9, fe82::cae2:65ff:fece
 ;
 
 lessThan
-required_capability: mv_warn
 
 from hosts | sort host, card, ip1 | where ip0 < ip1 | keep card, host, ip0, ip1;
 warningRegex:evaluation of \[ip0 < ip1\] failed, treating result as null. Only first 20 failures recorded.
@@ -73,7 +71,6 @@ lo0            |gamma          |fe80::cae2:65ff:fece:feb9|fe81::cae2:65ff:fece:f
 ;
 
 notEquals
-required_capability: mv_warn
 
 from hosts | sort host, card, ip1 | where ip0 != ip1 | keep card, host, ip0, ip1;
 warningRegex:evaluation of \[ip0 != ip1\] failed, treating result as null. Only first 20 failures recorded.
@@ -125,7 +122,6 @@ null           |[127.0.0.1, 127.0.0.2, 127.0.0.3]
 ;
 
 conditional
-required_capability: mv_warn
 
 from hosts | eval eq=case(ip0==ip1, ip0, ip1) | keep eq, ip0, ip1;
 ignoreOrder:true
@@ -146,7 +142,6 @@ fe80::cae2:65ff:fece:fec1                             |[fe80::cae2:65ff:fece:feb
 ;
 
 in
-required_capability: mv_warn
 
 from hosts | eval eq=case(ip0==ip1, ip0, ip1) | where eq in (ip0, ip1) | keep card, host, ip0, ip1, eq;
 ignoreOrder:true
@@ -168,7 +163,6 @@ eth0           |epsilon        |[fe80::cae2:65ff:fece:feb9, fe80::cae2:65ff:fece
 
 
 inWithWarningsRegex#[skip:-8.13.99, reason:regex warnings in tests introduced in v 8.14.0]
-required_capability: mv_warn
 
 from hosts | eval eq=case(ip0==ip1, ip0, ip1) | where eq in (ip0, ip1) | keep card, host, ip0, ip1, eq;
 ignoreOrder:true
@@ -188,7 +182,6 @@ eth0           |epsilon        |[fe80::cae2:65ff:fece:feb9, fe80::cae2:65ff:fece
 ;
 
 cidrMatchSimple
-required_capability: mv_warn
 
 from hosts | where cidr_match(ip1, "127.0.0.2/32") | keep card, host, ip0, ip1;
 warningRegex:evaluation of \[cidr_match\(ip1, \\\"127.0.0.2/32\\\"\)\] failed, treating result as null. Only first 20 failures recorded.
@@ -199,7 +192,6 @@ eth1           |beta           |127.0.0.1      |127.0.0.2
 ;
 
 cidrMatchNullField
-required_capability: mv_warn
 
 from hosts | where cidr_match(ip0, "127.0.0.2/32") is null | keep card, host, ip0, ip1;
 ignoreOrder:true
@@ -213,7 +205,6 @@ eth2           |epsilon        |[fe81::cae2:65ff:fece:feb9, fe82::cae2:65ff:fece
 ;
 
 cdirMatchMultipleArgs
-required_capability: mv_warn
 
 //tag::cdirMatchMultipleArgs[]
 FROM hosts 
@@ -233,7 +224,6 @@ eth0           |gamma          |fe80::cae2:65ff:fece:feb9|127.0.0.3
 ;
 
 cidrMatchFunctionArg
-required_capability: mv_warn
 
 from hosts | where cidr_match(ip1, concat("127.0.0.2", "/32"), "127.0.0.3/32") | keep card, host, ip0, ip1;
 ignoreOrder:true
@@ -246,7 +236,6 @@ eth0           |gamma          |fe80::cae2:65ff:fece:feb9|127.0.0.3
 ;
 
 cidrMatchFieldArg
-required_capability: mv_warn
 
 from hosts | eval cidr="127.0.0.2" | where cidr_match(ip1, cidr, "127.0.0.3/32") | keep card, host, ip0, ip1;
 ignoreOrder:true
@@ -366,7 +355,6 @@ eth0           |beta           |127.0.0.1  |::1
 ;
 
 pushDownIPWithIn
-required_capability: mv_warn
 
 from hosts | where ip1 in (to_ip("::1"), to_ip("127.0.0.1")) | keep card, host, ip0, ip1;
 ignoreOrder:true
@@ -380,7 +368,6 @@ eth0           |beta           |127.0.0.1   |::1
 ;
 
 pushDownIPWithComparision
-required_capability: mv_warn
 
 from hosts | where ip1 > to_ip("127.0.0.1") | keep card, ip1;
 ignoreOrder:true