Tests

Start moving away from named_type callback architecture #21631

Job	Run time
Test mypyc suite with 32-bit Python	10m 25s
Type check our own code (py310-windows-64)	2m 22s
mypyc runtime tests with py310-ubuntu	6m 19s
Test suite with py311-ubuntu	9m 31s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 14s
Test suite with py312-ubuntu	9m 54s
Formatting and code style with Black + ruff	1m 59s
Test suite with py310-ubuntu, mypyc-compiled	16m 21s
Test suite with py314-ubuntu, mypyc-compiled	15m 10s
mypyc runtime tests with py313-macos	7m 12s
Test suite with py314-windows-64	29m 5s
Type check our own code (py310-ubuntu)	1m 43s
Parallel tests with py314-ubuntu, interpreted	25m 1s
Test suite with py313-ubuntu, mypyc-compiled	15m 43s
Test suite with py314t-ubuntu, mypyc-compiled	20m 47s
Parallel tests with py314-windows-64, interpreted	10m 7s
	3h 28m 53s

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