Fix alias cloning for json recordset table-valued functions

[7645re]

Fix alias cloning for json[b]_to_recordset in
PgTableValuedFunctionExpression.Clone(...).

For TVFs without ColumnInfos such as unnest, the original
alias must be preserved. For jsonb_to_recordset, output
columns are explicitly named, so the cloned alias must be
applied instead.

This could previously cause execution-time failures such as
missing FROM-clause entry for table "o0".

Adds a regression test covering GroupBy over a query filtered
by a JSON collection predicate and projecting ordered group
elements.

Fixes #3790

[Copilot]

Pull request overview

Fixes alias handling when cloning PostgreSQL table-valued function (TVF) expressions used for JSON json[b]_to_recordset, preventing invalid SQL aliases that can surface as runtime failures (e.g. missing FROM-clause entries).

Changes:

• Adjust PgTableValuedFunctionExpression.Clone(...) to preserve the original alias when there is no explicit column list, and to apply the cloned alias when explicit output columns exist.
• Add a functional regression test covering a GroupBy over a JSON-collection predicate with projection of ordered group elements.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/EFCore.PG/Query/Expressions/Internal/PgTableValuedFunctionExpression.cs	Fixes alias cloning behavior for JSON recordset TVFs to keep FROM references consistent.
test/EFCore.PG.FunctionalTests/Query/AdHocJsonQueryNpgsqlTest.cs	Adds a regression scenario exercising JSON collection predicates combined with grouping and element projection.

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[roji]

Thanks for the fix.

Can you please change this PR to target main instead of hotfix/9.0.5? I can backport it later. You can do this by editing the PR to change the target branch, and then rebase it locally and force-push.

[7645re]

@roji everything seems to be done, are there any suggestions?

[roji]

Thanks, LGTM! Thanks for your contribution! I'll go ahead and backport this to 10.0.x as well.

[roji]

Backported to 10.0.2 via 12a1aa8