mypy

gh-146031: Allow keeping specialization enabled when specifying eval … #20758

Job	Run time
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Tools/cases_generator	19s
Run mypy on Lib/tomllib	21s
Run mypy on Tools/jit	23s
Run mypy on Lib/test/libregrtest	19s
Run mypy on Lib/_pyrepl	18s
Run mypy on Tools/build	21s
Run mypy on Tools/peg_generator	20s
Run mypy on Tools/clinic	20s
	2m 59s

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