mypy

gh-148211: decompose `_INSERT_1_LOAD_CONST_INLINE(_BORROW)` in JIT (G… #10409

Job	Run time
Run mypy on Tools/build	22s
Run mypy on Lib/tomllib	10s
Run mypy on Tools/peg_generator	23s
Run mypy on Tools/check-c-api-docs	19s
Run mypy on Tools/jit	24s
Run mypy on Tools/clinic	26s
Run mypy on Lib/test/libregrtest	19s
Run mypy on Lib/_pyrepl	21s
Run mypy on Tools/cases_generator	19s
	3m 3s

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