mypy

gh-149816: Fix a RC in `_random.Random.init` method (#149824) #21381

Job	Run time
Run mypy on Tools/peg_generator	18s
Run mypy on Lib/_pyrepl	18s
Run mypy on Lib/tomllib	17s
Run mypy on Tools/clinic	21s
Run mypy on Tools/build	18s
Run mypy on Tools/cases_generator	19s
Run mypy on Tools/jit	18s
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Lib/test/libregrtest	20s
	2m 46s

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