mypy

gh-139165: Make Py_SIZE, Py_IS_TYPE,Py_ SET_SIZE regular functions in… #18129

Job	Run time
Run mypy on Lib/test/libregrtest	20s
Run mypy on Lib/_pyrepl	13s
Run mypy on Tools/cases_generator	16s
Run mypy on Tools/jit	12s
Run mypy on Tools/build	17s
Run mypy on Tools/peg_generator	20s
Run mypy on Tools/clinic	16s
Run mypy on Lib/tomllib	16s
	2m 10s

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