mypy

gh-117716: Fix wave RIFF padding for data chunks (GH-145237) #20734

Job	Run time
Run mypy on Tools/check-c-api-docs	16s
Run mypy on Tools/build	18s
Run mypy on Tools/jit	19s
Run mypy on Tools/cases_generator	17s
Run mypy on Lib/test/libregrtest	20s
Run mypy on Lib/tomllib	21s
Run mypy on Lib/_pyrepl	16s
Run mypy on Tools/clinic	17s
Run mypy on Tools/peg_generator	22s
	2m 46s

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