mypy

gh-152236: Fix skips on `_testcapi.set_nomemory` tests (#152253) #22118

Job	Run time
Run mypy on Tools/jit	19s
Run mypy on Lib/test/libregrtest	21s
Run mypy on Tools/cases_generator	17s
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Lib/_pyrepl	21s
Run mypy on Tools/build	19s
Run mypy on Lib/tomllib	19s
Run mypy on Tools/clinic	18s
Run mypy on Tools/peg_generator	18s
	2m 50s

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