Tests

[mypyc] Fix missing cross-group header deps in incremental builds #22325

Job	Run time
Test mypyc suite with 32-bit Python	11m 37s
Parallel tests with py314-ubuntu, interpreted	27m 7s
Test suite with py312-ubuntu	10m 24s
Test suite with py314-ubuntu, mypyc-compiled	16m 31s
Test suite with py314t-ubuntu, mypyc-compiled	18m 19s
Test suite with py311-ubuntu	9m 36s
Test suite with py310-ubuntu, mypyc-compiled	17m 3s
Parallel tests with py314-ubuntu, mypyc-compiled	28m 40s
mypyc runtime tests with py310-ubuntu	7m 14s
Test suite with py314-windows-64	35m 6s
Test suite with py315-ubuntu, mypyc-compiled	16m 47s
Type check our own code (py310-windows-64)	1m 51s
Test suite with py313-ubuntu, mypyc-compiled	16m 44s
Formatting and code style with Black + ruff	1m 53s
Parallel tests with py314-windows-64, interpreted	11m 41s
Type check our own code (py310-ubuntu)	1m 12s
mypyc runtime tests with py313-macos	8m 50s
	4h 0m 35s

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