Reset Langver for OverloadsForCustomOperations

[KevinRansom]

This change produces unhelpful error messages. We should improve the messages before promoting this to FSharp5.0
This code produces:

let q1 = // no errors
    query {
        for d in [1..10] do
            if d > 3 then
                select d
    }

let q2 = 
    query {
        for d in [1..10] do
            where (d > 3)
                select d
    }

Produces:

error FS3095: 'select' is not used correctly. This is a custom operation in this query or computation expression.
error FS0039: The value or constructor 'd' is not defined.
error FS0501: The member or object constructor 'Where' takes 2 argument(s) but is here given 4. The required signature is 'member Linq.QueryBuilder.Where : source:Linq.QuerySource<'T,'Q> * predicate:('T -> bool) -> Linq.QuerySource<'T,'Q>'.

Instead of:

error FS3099: 'where' is used with an incorrect number of arguments. This is a custom operation in this query or computation expression. Expected 1 argument(s), but given 3.

I have to say both are pretty rubbish ...

I would be open to the argument that we will allow the update to happen, and someone will commit to fix the error messages.

[KevinRansom]

Nope, I can't do it:
This code:

// #Conformance #DataExpressions #Query
// DevDiv:210830, groupValBy with poor diagnostics
//<Expects status="error" span="(9,6-9,32)" id="FS0001">This expression was expected to have type.+'System\.Linq\.IGrouping<'a,'b>'.+but here has type.+'unit'</Expects>

let words = ["blueberry"; "chimpanzee"; ]
let wordGroups =
query {
   for w in words do
     groupValBy w w.[0]. into g
     select (g.Key, g.ToArray())
}

produces these errors:

c:\kevinransom\fsharp>artifacts\bin\fsc\Debug\net472\fsc C:\kevinransom\fsharp\tests\fsharpqa\Source\Conformance\Expressions\DataExpressions\QueryExpressions\E_BadGroupValBy02.fs
Microsoft (R) F# Compiler version 11.0.0.0 for F# 5.0
Copyright (c) Microsoft Corporation. All Rights Reserved.

C:\kevinransom\fsharp\tests\fsharpqa\Source\Conformance\Expressions\DataExpressions\QueryExpressions\E_BadGroupValBy02.fs(7,1): 
warning FS0058: Possible incorrect indentation: this token is offside of context started at position (6:1). Try indenting this token further or using standard formatting conventions.

C:\kevinransom\fsharp\tests\fsharpqa\Source\Conformance\Expressions\DataExpressions\QueryExpressions\E_BadGroupValBy02.fs(7,1): 
warning FS0058: Possible incorrect indentation: this token is offside of context started at position (6:1). Try indenting this token further or using standard formatting conventions.

C:\kevinransom\fsharp\tests\fsharpqa\Source\Conformance\Expressions\DataExpressions\QueryExpressions\E_BadGroupValBy02.fs(9,6): 
error FS3099: 'groupValBy' is used with an incorrect number of arguments. This is a custom operation in this query or computation expression. Expected 2 argument(s), but given 3.

C:\kevinransom\fsharp\tests\fsharpqa\Source\Conformance\Expressions\DataExpressions\QueryExpressions\E_BadGroupValBy02.fs(9,6): 
error FS0001: This expression was expected to have type
    'System.Linq.IGrouping<'a,'b>'
but here has type
    'unit'