mypy

GH-83065: Fix import deadlock by implementing hierarchical module loc… #20923

Job	Run time
Run mypy on Tools/build	20s
Run mypy on Tools/cases_generator	18s
Run mypy on Tools/jit	20s
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Tools/peg_generator	21s
Run mypy on Lib/_pyrepl	21s
Run mypy on Tools/clinic	17s
Run mypy on Lib/tomllib	21s
Run mypy on Lib/test/libregrtest	19s
	2m 54s

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