mypy

gh-154467: Fix empty (Pdb) prompt when attaching to a process with pd… #22810

Job	Run time
Run mypy on Lib/tomllib	17s
Run mypy on Tools/build	18s
Run mypy on Tools/clinic	24s
Run mypy on Tools/check-c-api-docs	20s
Run mypy on Lib/test/libregrtest	16s
Run mypy on Lib/_pyrepl	20s
Run mypy on Tools/peg_generator	17s
Run mypy on Tools/cases_generator	18s
Run mypy on Tools/jit	20s
	2m 50s

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