mypy

GH-134282: Simplify LOAD_CONST: Always borrow the reference #14798

Job	Run time
Run mypy on Lib/_pyrepl	17s
Run mypy on Lib/test/libregrtest	19s
Run mypy on Lib/tomllib	13s
Run mypy on Tools/build	19s
Run mypy on Tools/cases_generator	17s
Run mypy on Tools/clinic	18s
Run mypy on Tools/jit	16s
Run mypy on Tools/peg_generator	15s
	2m 14s

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