mypy

gh-146445: Migrate Android build tools to the Platforms folder. (#148… #20697

Job	Run time
Run mypy on Lib/_pyrepl	16s
Run mypy on Lib/test/libregrtest	20s
Run mypy on Tools/check-c-api-docs	20s
Run mypy on Tools/build	16s
Run mypy on Lib/tomllib	18s
Run mypy on Tools/cases_generator	18s
Run mypy on Tools/jit	20s
Run mypy on Tools/clinic	16s
Run mypy on Tools/peg_generator	20s
	2m 44s

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