mypy

GH-59633: Clarify dest collisions in argparse docs (#150987) #21794

Job	Run time
Run mypy on Tools/clinic	18s
Run mypy on Tools/build	18s
Run mypy on Tools/peg_generator	28s
Run mypy on Tools/jit	21s
Run mypy on Tools/cases_generator	22s
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Lib/_pyrepl	19s
Run mypy on Lib/tomllib	17s
Run mypy on Lib/test/libregrtest	17s
	2m 58s

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