mypy

gh-141594: A free-threaded JIT #17985

Job	Run time
Run mypy on Lib/_pyrepl	19s
Run mypy on Tools/build	17s
Run mypy on Lib/tomllib	17s
Run mypy on Lib/test/libregrtest	19s
Run mypy on Tools/peg_generator	24s
Run mypy on Tools/cases_generator	18s
Run mypy on Tools/jit	18s
Run mypy on Tools/clinic	17s
	2m 29s

Provide feedback