mypy

gh-145557: Check ctypes is available in test_external_inspection (#14… #10249

Job	Run time
Run mypy on Tools/build	28s
Run mypy on Lib/test/libregrtest	24s
Run mypy on Tools/clinic	15s
Run mypy on Tools/cases_generator	18s
Run mypy on Lib/tomllib	18s
Run mypy on Tools/check-c-api-docs	23s
Run mypy on Lib/_pyrepl	20s
Run mypy on Tools/jit	19s
Run mypy on Tools/peg_generator	18s
	3m 3s

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