mypy

gh-145376: Fix reference leaks in deque (#145421) #19790

Job	Run time
Run mypy on Tools/check-c-api-docs	21s
Run mypy on Lib/tomllib	20s
Run mypy on Lib/_pyrepl	19s
Run mypy on Tools/cases_generator	19s
Run mypy on Lib/test/libregrtest	23s
Run mypy on Tools/build	14s
Run mypy on Tools/peg_generator	18s
Run mypy on Tools/jit	18s
Run mypy on Tools/clinic	13s
	2m 45s

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