Tests

Revert dict.or typeshed change #21595

Job	Run time
Test mypyc suite with 32-bit Python	25m 40s
Parallel tests with py314-ubuntu, mypyc-compiled	25m 43s
Type check our own code (py310-ubuntu)	1m 53s
Type check our own code (py310-windows-64)	2m 46s
mypyc runtime tests with py313-macos	5m 50s
Parallel tests with py314-windows-64, interpreted	10m 9s
Formatting and code style with Black + ruff	1m 48s
Test suite with py313-ubuntu, mypyc-compiled	15m 33s
Test suite with py314-windows-64	25m 36s
Test suite with py312-ubuntu	9m 48s
Parallel tests with py314-ubuntu, interpreted	23m 22s
Test suite with py310-ubuntu, mypyc-compiled	15m 22s
mypyc runtime tests with py310-ubuntu	6m 28s
Test suite with py311-ubuntu	9m 13s
Test suite with py314t-ubuntu, mypyc-compiled	17m 18s
Test suite with py314-ubuntu, mypyc-compiled	15m 50s
	3h 32m 19s

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