Sync typeshed #12246

Job	Run time
Test mypyc suite with 32-bit Python	8m 18s
Test suite with py38-ubuntu, mypyc-compiled	19m 52s
Test suite with py38-windows-64	26m 8s
Test suite with py39-ubuntu	19m 11s
Test suite with py310-ubuntu	17m 38s
Test suite with py311-ubuntu, mypyc-compiled	17m 29s
Test suite with py312-ubuntu, mypyc-compiled	21m 27s
mypyc runtime tests with py39-macos	5m 10s
mypyc runtime tests with py38-debug-build-ubuntu	5m 24s
Type check our own code (py38-ubuntu)	1m 47s
Type check our own code (py38-windows-64)	2m 34s
Formatting and code style with Black + ruff	35s
	2h 25m 33s

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