mypy

gh-143706: Fix sys.argv not set during multiprocessing forkserver `__… #19065

Job	Run time
Run mypy on Lib/tomllib	19s
Run mypy on Tools/peg_generator	25s
Run mypy on Tools/cases_generator	19s
Run mypy on Tools/clinic	18s
Run mypy on Tools/jit	20s
Run mypy on Lib/test/libregrtest	18s
Run mypy on Tools/check-c-api-docs	20s
Run mypy on Lib/_pyrepl	17s
Run mypy on Tools/build	19s
	2m 55s

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