mypy

gh-116738: Fix thread-safety issue in re module for free threading (g… #18145

Job	Run time
Run mypy on Lib/test/libregrtest	23s
Run mypy on Tools/jit	20s
Run mypy on Lib/_pyrepl	18s
Run mypy on Tools/cases_generator	19s
Run mypy on Tools/build	20s
Run mypy on Tools/peg_generator	19s
Run mypy on Tools/clinic	16s
Run mypy on Lib/tomllib	20s
	2m 35s

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