Tests

Mypybot/sync typeshed (#17280) #430

Job	Run time
Test suite with py38-ubuntu, mypyc-compiled	17m 39s
Test mypyc suite with 32-bit Python	7m 13s
Test suite with py38-windows-64	20m 17s
Test suite with py39-ubuntu	16m 52s
Test suite with py310-ubuntu	16m 4s
Test suite with py311-ubuntu, mypyc-compiled	15m 22s
Test suite with py312-ubuntu, mypyc-compiled	17m 17s
mypyc runtime tests with py39-macos	5m 2s
mypyc runtime tests with py38-debug-build-ubuntu	4m 33s
Type check our own code (py38-ubuntu)	1m 49s
Type check our own code (py38-windows-64)	2m 26s
Formatting and code style with Black + ruff	40s
	2h 5m 14s

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