Properly check for typing_extensions variant of TypeAliasType

[Daraan]

Change Summary

Added support for recent typing_extensions.TypeAliasType from python/typing_extensions#477 that cause tests to fail currently.

Related issue number

fix #10711

python/typing_extensions#493

Checklist

• The pull request title is a good summary of the changes - it will be used in the changelog
• Unit tests for the changes exist
• Tests pass on CI
• Documentation reflects the changes where applicable
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

Selected Reviewer: @sydney-runkle

[codspeed-hq]

CodSpeed Performance Report

Merging #10713 will not alter performance

_{Comparing Daraan:TypeAliasType-backport (373dddd) with main (12f89be)}

Summary

✅ 44 untouched benchmarks

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
pydantic/_internal
_core_utils.py
_generate_schema.py
_typing_extra.py					604
Project Total

This report was generated by python-coverage-comment-action

[Daraan]

please review

[Viicos]

Thanks for the investigation and for the PR. I had this issue in my mind for some time now, and actually there's some other places where we're not careful enough (e.g. is Any checks). Is it fine if I tackle everything in a single PR, adding you as a co-author?

[Daraan]

Thanks for the investigation and for the PR. I had this issue in my mind for some time now, and actually there's some other places where we're not careful enough (e.g. is Any checks). Is it fine if I tackle everything in a single PR, adding you as a co-author?

Sure thing!

[JelleZijlstra]

@Viicos I'd appreciate if this gets merged relatively quickly so the daily typing-extensions workflow that runs the pydantic test suite starts passing again. (Of course there are other workarounds; we could temporarily disable the pydantic tests, or just close the issue every day.)

[Viicos]

Ah didn't know that, I'll merge immediately and rebase on my working branch!

[Viicos]

Thanks @Daraan