Fix columnObject crash with array of variadic dimension elems

[canhld94]

Changelog category (leave one):

• Bug Fix (user-visible misbehavior in official stable or prestable release)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

• Fix crash while parsing values of type Object that contains arrays of variadic dimension.

Close #40333

Following queries will crash the server without need to SET allow_experimental_object_type=1

SELECT * FROM url('https://datahub.io/core/geo-countries/r/0.geojson', JSONAsObject); -- select from url
-- test.json: {"array" : [ {"val" : 1} , {"val" : [ 1 ] } ] }
SELECT * FROM file('test.json', JSONAsObject); -- select from file
SELECT CAST('{"x" : [ 1 , [ 1 , 2] ]}', 'Object(\'json\')'); -- cast to object type

The crash reason is column object assume all elements in array have same dimension and lead to segfault in serialization. The solution can be either (1) disallow variadic dimension in array, or (2) fold elements in array to same dimensions. This MR implements approach (2).
I personally think approach (2) is consistent to #23516 as we can consider high dimension arrays as super-type of lower dimension arrays of the same type.

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[canhld94]

Test fail reason:

SELECT CAST('{"x" : [ {} , [ 1 , 2] ]}', 'Object(\'json\')');
Expect: {"x" : [ [] , [ 1 , 2] ]}'
Return: {"x" : [ [0] , [ 1 , 2] ]}'

Finding the cause.

[canhld94]

Integration case fail not relates. ASTFuzzer fail because it generate a query with ORDER BY <JSON>, no idea how to fix..

[canhld94]

Wait for #40754

[CurtizJ]

Fuzzer failures will be fixed by #40754 and are not related to changes in this PR, so let's merge now.