mypy

gh-145376: Fix various refleaks in Objects/ (#145609) #19827

Job	Run time
Run mypy on Tools/build	18s
Run mypy on Lib/_pyrepl	21s
Run mypy on Lib/tomllib	17s
Run mypy on Lib/test/libregrtest	24s
Run mypy on Tools/jit	21s
Run mypy on Tools/cases_generator	18s
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Tools/peg_generator	18s
Run mypy on Tools/clinic	20s
	2m 55s

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