mypy

gh-134716: Support regular expressions in -W and PYTHONWARNINGS (GH-1… #9601

Job	Run time
Run mypy on Lib/tomllib	19s
Run mypy on Tools/clinic	22s
Run mypy on Tools/build	16s
Run mypy on Tools/cases_generator	21s
Run mypy on Tools/peg_generator	22s
Run mypy on Lib/test/libregrtest	20s
Run mypy on Lib/_pyrepl	18s
Run mypy on Tools/jit	16s
	2m 34s

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