Tests

Fix `--strict-equality` for iteratively visited code #19758

Job	Run time
Test mypyc suite with 32-bit Python	9m 12s
Test suite with py312-ubuntu	9m 49s
Type check our own code (py310-ubuntu)	1m 44s
Test suite with py314t-ubuntu, mypyc-compiled	15m 42s
mypyc runtime tests with py313-macos	5m 20s
Test suite with py310-ubuntu, mypyc-compiled	14m 13s
mypyc runtime tests with py310-ubuntu	5m 1s
Type check our own code (py310-windows-64)	2m 38s
Parallel tests with py314-ubuntu, interpreted	22m 15s
Test suite with py313-ubuntu, mypyc-compiled	13m 46s
Test suite with py314-windows-64	28m 7s
Formatting and code style with Black + ruff	1m 57s
Test suite with py314-ubuntu, mypyc-compiled	13m 45s
Test suite with py311-ubuntu	8m 53s
Parallel tests with py314-ubuntu, mypyc-compiled	26m 30s
	2h 58m 52s

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