mypy

Post 3.15.0a5 #19112

Job	Run time
Run mypy on Lib/tomllib	16s
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Lib/_pyrepl	17s
Run mypy on Tools/cases_generator	18s
Run mypy on Lib/test/libregrtest	22s
Run mypy on Tools/clinic	17s
Run mypy on Tools/build	17s
Run mypy on Tools/jit	16s
Run mypy on Tools/peg_generator	18s
	2m 38s

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