Tests

[mypyc] Fix vtable pointer with inherited dunder new #19502

Job	Run time
Test mypyc suite with 32-bit Python	8m 48s
Test suite with py39-ubuntu, mypyc-compiled	15m 59s
Test suite with py311-ubuntu	8m 55s
mypyc runtime tests with py310-ubuntu	4m 45s
Test suite with py310-ubuntu	12m 26s
Test suite with py314-windows-64	21m 59s
Test suite with py313-ubuntu, mypyc-compiled	15m 9s
mypyc runtime tests with py313-macos	5m 57s
Test suite with py312-ubuntu, mypyc-compiled	14m 15s
Type check our own code (py39-ubuntu)	1m 30s
Formatting and code style with Black + ruff	1m 57s
Type check our own code (py39-windows-64)	2m 20s
Test suite with py314-ubuntu, mypyc-compiled	14m 26s
	2h 8m 26s

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