mypy

gh-151112: Fix crash in `compiler_mod()` when entering the current co… #21849

Job	Run time
Run mypy on Tools/peg_generator	19s
Run mypy on Tools/build	22s
Run mypy on Tools/cases_generator	21s
Run mypy on Lib/tomllib	18s
Run mypy on Lib/_pyrepl	20s
Run mypy on Tools/check-c-api-docs	20s
Run mypy on Tools/clinic	18s
Run mypy on Tools/jit	19s
Run mypy on Lib/test/libregrtest	20s
	2m 57s

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