Tests

[mypyc] Enable incremental self-compilation #22123

Job	Run time
Test mypyc suite with 32-bit Python	10m 14s
Test suite with py311-ubuntu	9m 33s
Test suite with py312-ubuntu	10m 3s
Test suite with py310-ubuntu, mypyc-compiled	16m 28s
Test suite with py314-ubuntu, mypyc-compiled	15m 54s
Test suite with py313-ubuntu, mypyc-compiled	16m 11s
mypyc runtime tests with py313-macos	6m 18s
Test suite with py314t-ubuntu, mypyc-compiled	18m 27s
Parallel tests with py314-windows-64, interpreted	10m 22s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 40s
Parallel tests with py314-ubuntu, interpreted	24m 22s
Formatting and code style with Black + ruff	1m 52s
Type check our own code (py310-windows-64)	1m 39s
Type check our own code (py310-ubuntu)	1m 9s
mypyc runtime tests with py310-ubuntu	7m 8s
Test suite with py314-windows-64	29m 42s
	3h 27m 2s

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