Tests

Fix crash on star import of redefinition #19573

Job	Run time
Test mypyc suite with 32-bit Python	8m 27s
Test suite with py313-ubuntu, mypyc-compiled	14m 40s
Test suite with py310-ubuntu, mypyc-compiled	14m 9s
Test suite with py311-ubuntu	9m 26s
Test suite with py314-windows-64	30m 16s
Test suite with py312-ubuntu	10m 0s
Test suite with py314-ubuntu, mypyc-compiled	15m 4s
Type check our own code (py310-windows-64)	2m 42s
Formatting and code style with Black + ruff	1m 58s
mypyc runtime tests with py310-ubuntu	4m 53s
mypyc runtime tests with py313-macos	5m 23s
Type check our own code (py310-ubuntu)	1m 34s
	1h 58m 32s

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