Tests

Fix `--strict-equality` for iteratively visited code (#19635) #19793

Job	Run time
Test mypyc suite with 32-bit Python	9m 17s
Test suite with py313-ubuntu, mypyc-compiled	13m 48s
Test suite with py314t-ubuntu, mypyc-compiled	16m 2s
Test suite with py311-ubuntu	9m 10s
Type check our own code (py310-windows-64)	2m 36s
Test suite with py314-windows-64	27m 8s
Test suite with py312-ubuntu	9m 53s
Test suite with py314-ubuntu, mypyc-compiled	14m 8s
Parallel tests with py314-ubuntu, mypyc-compiled	26m 27s
Formatting and code style with Black + ruff	1m 58s
mypyc runtime tests with py310-ubuntu	5m 12s
Test suite with py310-ubuntu, mypyc-compiled	14m 15s
mypyc runtime tests with py313-macos	6m 1s
Parallel tests with py314-ubuntu, interpreted	23m 46s
Type check our own code (py310-ubuntu)	1m 40s
	3h 1m 21s

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