mypy

gh-149358: Generating JIT recorder transformers and stabilizing family layouts #21137

Job	Run time
Run mypy on Tools/clinic	19s
Run mypy on Lib/test/libregrtest	25s
Run mypy on Lib/tomllib	17s
Run mypy on Lib/_pyrepl	13s
Run mypy on Tools/check-c-api-docs	16s
Run mypy on Tools/cases_generator	20s
Run mypy on Tools/build	19s
Run mypy on Tools/peg_generator	14s
Run mypy on Tools/jit	20s
	2m 43s

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