mypy

gh-134584: Eliminate redundant refcounting from `_LOAD_ATTR_WITH_HINT… #18716

Job	Run time
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Tools/build	17s
Run mypy on Lib/_pyrepl	20s
Run mypy on Lib/tomllib	17s
Run mypy on Lib/test/libregrtest	19s
Run mypy on Tools/peg_generator	16s
Run mypy on Tools/cases_generator	16s
Run mypy on Tools/jit	17s
Run mypy on Tools/clinic	16s
	2m 36s

Provide feedback