mypy

gh-129748: Remove TSan suppression for mi_block_set_nextx (gh-142887) #18616

Job	Run time
Run mypy on Tools/jit	24s
Run mypy on Lib/tomllib	17s
Run mypy on Tools/peg_generator	20s
Run mypy on Lib/test/libregrtest	23s
Run mypy on Tools/build	20s
Run mypy on Lib/_pyrepl	22s
Run mypy on Tools/check-c-api-docs	22s
Run mypy on Tools/cases_generator	12s
Run mypy on Tools/clinic	22s
	3m 2s

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