Tests

Fix self check on macOS #21678

Job	Run time
Test mypyc suite with 32-bit Python	10m 38s
Test suite with py311-ubuntu	9m 5s
Test suite with py312-ubuntu	9m 25s
Test suite with py314t-ubuntu, mypyc-compiled	17m 38s
mypyc runtime tests with py313-macos	6m 32s
Test suite with py314-ubuntu, mypyc-compiled	14m 37s
Formatting and code style with Black + ruff	1m 53s
Parallel tests with py314-ubuntu, mypyc-compiled	28m 22s
Test suite with py313-ubuntu, mypyc-compiled	15m 59s
Test suite with py314-windows-64	25m 32s
Type check our own code (py310-ubuntu)	1m 42s
Test suite with py310-ubuntu, mypyc-compiled	16m 24s
mypyc runtime tests with py310-ubuntu	6m 42s
Type check our own code (py310-windows-64)	2m 49s
Parallel tests with py314-ubuntu, interpreted	26m 9s
Parallel tests with py314-windows-64, interpreted	7m 56s
	3h 21m 23s

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