mypy

gh-136912: fix handling of `OverflowError` in `hmac.digest` (#136917) #9417

Job	Run time
Run mypy on Lib/test/libregrtest	19s
Run mypy on Tools/build	15s
Run mypy on Lib/_pyrepl	16s
Run mypy on Lib/tomllib	13s
Run mypy on Tools/cases_generator	18s
Run mypy on Tools/peg_generator	18s
Run mypy on Tools/jit	19s
Run mypy on Tools/clinic	19s
	2m 17s

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