mypy

gh-145376: Fix various reference leaks in Objects/ and Modules/ (#145… #19828

Job	Run time
Run mypy on Tools/peg_generator	20s
Run mypy on Tools/jit	21s
Run mypy on Tools/cases_generator	19s
Run mypy on Tools/build	19s
Run mypy on Lib/tomllib	17s
Run mypy on Tools/clinic	27s
Run mypy on Lib/_pyrepl	17s
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Lib/test/libregrtest	20s
	2m 58s

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