Tests

Fix crash on circular star import in incremental mode (#20511) #19936

Job	Run time
Test mypyc suite with 32-bit Python	9m 1s
Test suite with py311-ubuntu	9m 27s
Test suite with py314-ubuntu, mypyc-compiled	13m 31s
Test suite with py310-ubuntu, mypyc-compiled	13m 59s
Test suite with py313-ubuntu, mypyc-compiled	13m 40s
Test suite with py314t-ubuntu, mypyc-compiled	16m 4s
Type check our own code (py310-windows-64)	2m 28s
Parallel tests with py314-ubuntu, mypyc-compiled	26m 21s
Test suite with py312-ubuntu	9m 59s
Formatting and code style with Black + ruff	1m 55s
mypyc runtime tests with py310-ubuntu	5m 17s
Test suite with py314-windows-64	27m 37s
Parallel tests with py314-ubuntu, interpreted	24m 36s
Type check our own code (py310-ubuntu)	1m 37s
mypyc runtime tests with py313-macos	5m 36s
	3h 1m 8s

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