mypy

gh-155648: Fix IDLE tests that cannot fail (#156257) #23286

Job	Run time
Run mypy on Lib/tomllib	20s
Run mypy on Tools/clinic	20s
Run mypy on Tools/cases_generator	20s
Run mypy on Tools/peg_generator	19s
Run mypy on Tools/jit	22s
Run mypy on Tools/build	21s
Run mypy on Lib/test/libregrtest	26s
Run mypy on Tools/check-c-api-docs	24s
Run mypy on Lib/_pyrepl	18s
	3m 10s

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