Tests

Fix #20821: Check qualname assignment type in class body #21703

Job	Run time
Test mypyc suite with 32-bit Python	10m 41s
Test suite with py314t-ubuntu, mypyc-compiled	18m 17s
Test suite with py313-ubuntu, mypyc-compiled	15m 8s
Test suite with py311-ubuntu	8m 57s
Test suite with py314-ubuntu, mypyc-compiled	15m 26s
Test suite with py312-ubuntu	9m 32s
mypyc runtime tests with py313-macos	6m 13s
mypyc runtime tests with py310-ubuntu	6m 39s
Test suite with py314-windows-64	26m 26s
Parallel tests with py314-ubuntu, interpreted	25m 12s
Parallel tests with py314-windows-64, interpreted	7m 7s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 5s
Formatting and code style with Black + ruff	1m 59s
Test suite with py310-ubuntu, mypyc-compiled	15m 59s
Type check our own code (py310-windows-64)	2m 27s
Type check our own code (py310-ubuntu)	1m 34s
	3h 20m 42s

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