mypy

gh-136285: Improve `pickle` protocol testing in `test_interpreters` (… #15581

Job	Run time
Run mypy on Lib/_pyrepl	18s
Run mypy on Tools/peg_generator	18s
Run mypy on Lib/test/libregrtest	20s
Run mypy on Lib/tomllib	17s
Run mypy on Tools/clinic	15s
Run mypy on Tools/jit	18s
Run mypy on Tools/build	15s
Run mypy on Tools/cases_generator	14s
	2m 15s

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