mypy

gh-95004: specialize access to enums and fix scaling on free-threadin… #20490

Job	Run time
Run mypy on Lib/tomllib	15s
Run mypy on Tools/clinic	18s
Run mypy on Lib/_pyrepl	19s
Run mypy on Tools/peg_generator	19s
Run mypy on Tools/build	20s
Run mypy on Lib/test/libregrtest	20s
Run mypy on Tools/check-c-api-docs	19s
Run mypy on Tools/cases_generator	16s
Run mypy on Tools/jit	21s
	2m 47s

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