mypy

gh-144007: Eliminate redundant refcounting in the JIT for BINARY_OP (… #19246

Job	Run time
Run mypy on Lib/test/libregrtest	22s
Run mypy on Lib/tomllib	17s
Run mypy on Tools/check-c-api-docs	19s
Run mypy on Tools/peg_generator	22s
Run mypy on Tools/build	19s
Run mypy on Tools/jit	22s
Run mypy on Tools/cases_generator	19s
Run mypy on Tools/clinic	17s
Run mypy on Lib/_pyrepl	23s
	3m 0s

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