mypy

gh-143249: Fix buffer leak when overlapped operation fails to start o… #19079

Job	Run time
Run mypy on Tools/clinic	18s
Run mypy on Tools/build	26s
Run mypy on Tools/jit	18s
Run mypy on Lib/_pyrepl	23s
Run mypy on Lib/test/libregrtest	19s
Run mypy on Tools/peg_generator	19s
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Lib/tomllib	20s
Run mypy on Tools/cases_generator	24s
	3m 4s

Provide feedback