Allow callable discriminator to be applied on PEP 695 type aliases

[Viicos]

Change Summary

Fixes #11930.

Related issue number

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

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[codspeed-hq]

CodSpeed Performance Report

Merging #11941 will create unknown performance changes

_{Comparing type-alias-tag (7f54ea1) with main (fb6117a)}

Summary

🆕 46 new benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
🆕	test_getattr	N/A	54.6 µs	N/A
🆕	test_setattr	N/A	89.7 µs	N/A
🆕	test_efficiency_with_highly_nested_examples	N/A	730.3 µs	N/A
🆕	test_schema_build	N/A	2.7 ms	N/A
🆕	test_fastapi_startup_perf	N/A	83 ms	N/A
🆕	test_fastapi_startup_perf	N/A	19.8 ms	N/A
🆕	test_import_basemodel	N/A	26 µs	N/A
🆕	test_import_field	N/A	25.9 µs	N/A
🆕	test_isinstance_basemodel	N/A	26.9 ms	N/A
🆕	test_complex_model_schema_generation	N/A	1.5 ms	N/A
🆕	test_construct_dataclass_schema	N/A	1.1 ms	N/A
🆕	test_failed_rebuild	N/A	218.5 µs	N/A
🆕	test_lots_of_models_with_lots_of_fields	N/A	2 s	N/A
🆕	test_model_validators_serializers	N/A	763.6 µs	N/A
🆕	test_nested_model_schema_generation	N/A	825.7 µs	N/A
🆕	test_recursive_model_schema_generation	N/A	839.4 µs	N/A
🆕	test_simple_model_schema_generation	N/A	606.3 µs	N/A
🆕	test_simple_model_schema_lots_of_fields_generation	N/A	22.3 ms	N/A
🆕	test_tagged_union_with_callable_discriminator_schema_generation	N/A	1 ms	N/A
🆕	test_tagged_union_with_str_discriminator_schema_generation	N/A	1 ms	N/A
...	...	...	...	...

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[github-actions]

Coverage report

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File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
pydantic
types.py
Project Total

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