Fix metaclass resolution algorithm #13108

Job	Run time
Test mypyc suite with 32-bit Python	6m 42s
Test suite with py38-ubuntu, mypyc-compiled	19m 36s
Test suite with Python nightly	14m 11s
Test suite with py38-windows-64	19m 36s
Test suite with py39-ubuntu	16m 16s
Test suite with py310-ubuntu	16m 13s
Test suite with py311-ubuntu, mypyc-compiled	15m 47s
Test suite with py312-ubuntu, mypyc-compiled	18m 13s
mypyc runtime tests with py39-macos	5m 19s
mypyc runtime tests with py38-debug-build-ubuntu	4m 22s
Type check our own code (py38-ubuntu)	2m 1s
Type check our own code (py38-windows-64)	2m 19s
Formatting and code style with Black + ruff	38s
	2h 21m 13s

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