mypy

gh-145110: Fix cleaning of PGO builds in Windows build.bat script (GH… #19664

Job	Run time
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Tools/build	17s
Run mypy on Tools/cases_generator	19s
Run mypy on Tools/peg_generator	17s
Run mypy on Lib/tomllib	14s
Run mypy on Lib/test/libregrtest	19s
Run mypy on Lib/_pyrepl	19s
Run mypy on Tools/clinic	17s
Run mypy on Tools/jit	18s
	2m 37s

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