mypy

GH-126910: Add gdb support for unwinding JIT frames #20809

Job	Run time
Run mypy on Tools/cases_generator	28s
Run mypy on Lib/tomllib	18s
Run mypy on Lib/_pyrepl	39s
Run mypy on Tools/jit	17s
Run mypy on Tools/build	17s
Run mypy on Tools/peg_generator	27s
Run mypy on Lib/test/libregrtest	17s
Run mypy on Tools/clinic	21s
Run mypy on Tools/check-c-api-docs	17s
	3m 21s

Provide feedback