Tests

[mypyc] Fix missing cross-group header deps in incremental builds (#2… #22360

Job	Run time
Test mypyc suite with 32-bit Python	11m 46s
Test suite with py310-ubuntu, mypyc-compiled	17m 28s
Test suite with py312-ubuntu	9m 56s
Test suite with py313-ubuntu, mypyc-compiled	15m 37s
Test suite with py314-ubuntu, mypyc-compiled	15m 47s
Parallel tests with py314-windows-64, interpreted	10m 45s
Test suite with py311-ubuntu	9m 28s
mypyc runtime tests with py310-ubuntu	6m 59s
Test suite with py314t-ubuntu, mypyc-compiled	17m 55s
Type check our own code (py310-ubuntu)	1m 14s
Formatting and code style with Black + ruff	1m 56s
Test suite with py314-windows-64	31m 54s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 28s
mypyc runtime tests with py313-macos	6m 13s
Type check our own code (py310-windows-64)	1m 54s
Test suite with py315-ubuntu, mypyc-compiled	15m 39s
Parallel tests with py314-ubuntu, interpreted	24m 56s
	3h 48m 55s

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