Sync typeshed (#17201) #12339

Job	Run time
Test suite with py38-ubuntu, mypyc-compiled	20m 22s
Test mypyc suite with 32-bit Python	8m 19s
Test suite with py38-windows-64	30m 36s
Test suite with py39-ubuntu	21m 38s
Test suite with py310-ubuntu	17m 35s
Test suite with py311-ubuntu, mypyc-compiled	17m 42s
Test suite with py312-ubuntu, mypyc-compiled	20m 21s
mypyc runtime tests with py39-macos	6m 4s
mypyc runtime tests with py38-debug-build-ubuntu	5m 33s
Type check our own code (py38-ubuntu)	1m 54s
Type check our own code (py38-windows-64)	2m 23s
Formatting and code style with Black + ruff	36s
	2h 33m 3s

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