mypy

gh-144706: Warn against using synchronization primitives within signa… #19512

Job	Run time
Run mypy on Tools/jit	18s
Run mypy on Lib/_pyrepl	17s
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Lib/test/libregrtest	23s
Run mypy on Tools/cases_generator	17s
Run mypy on Lib/tomllib	18s
Run mypy on Tools/build	18s
Run mypy on Tools/peg_generator	15s
Run mypy on Tools/clinic	20s
	2m 44s

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