Tests

Narrow context fallback limitation to walrus only #21868

Job	Run time
Test mypyc suite with 32-bit Python	10m 40s
Test suite with py313-ubuntu, mypyc-compiled	16m 11s
Test suite with py311-ubuntu	8m 59s
mypyc runtime tests with py313-macos	7m 1s
Test suite with py312-ubuntu	9m 39s
Test suite with py314-windows-64	27m 0s
Test suite with py314t-ubuntu, mypyc-compiled	16m 56s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 26s
mypyc runtime tests with py310-ubuntu	7m 3s
Type check our own code (py310-ubuntu)	1m 12s
Formatting and code style with Black + ruff	1m 48s
Test suite with py310-ubuntu, mypyc-compiled	16m 13s
Type check our own code (py310-windows-64)	1m 50s
Parallel tests with py314-windows-64, interpreted	8m 27s
Parallel tests with py314-ubuntu, interpreted	25m 6s
Test suite with py314-ubuntu, mypyc-compiled	16m 3s
	3h 21m 34s

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