Tests

[WIP] Optimize SCC scheduler `not_ready_deps` tracking #22078

Job	Run time
Test mypyc suite with 32-bit Python	11m 37s
Test suite with py311-ubuntu	9m 46s
Test suite with py310-ubuntu, mypyc-compiled	16m 32s
Test suite with py312-ubuntu	9m 42s
Test suite with py314t-ubuntu, mypyc-compiled	17m 43s
mypyc runtime tests with py310-ubuntu	6m 37s
Parallel tests with py314-ubuntu, mypyc-compiled	28m 26s
Parallel tests with py314-windows-64, interpreted	9m 28s
Parallel tests with py314-ubuntu, interpreted	25m 51s
mypyc runtime tests with py313-macos	5m 57s
Test suite with py313-ubuntu, mypyc-compiled	15m 52s
Type check our own code (py310-ubuntu)	1m 9s
Test suite with py314-windows-64	31m 36s
Formatting and code style with Black + ruff	1m 55s
Type check our own code (py310-windows-64)	2m 14s
Test suite with py314-ubuntu, mypyc-compiled	15m 40s
	3h 30m 5s

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