Tests

[codex] Add walrus allow-redefinition test #22608

Job	Run time
Test mypyc suite with 32-bit Python	12m 3s
Formatting and code style with Black + ruff	1m 49s
Type check our own code (py310-windows-64)	1m 47s
Test suite with py314t-ubuntu, mypyc-compiled	17m 30s
Parallel tests with py314-ubuntu, mypyc-compiled	28m 52s
Parallel tests with py314-windows-64, interpreted	11m 22s
Type check our own code (py310-ubuntu)	1m 14s
Parallel tests with py314-ubuntu, interpreted	25m 40s
Test suite with py314-windows-64	25m 27s
Test suite with py310-ubuntu, mypyc-compiled	16m 46s
Test suite with py315-ubuntu, mypyc-compiled	15m 14s
mypyc runtime tests with py313-macos	7m 26s
Test suite with py314-ubuntu, mypyc-compiled	16m 17s
Test suite with py312-ubuntu	10m 29s
Test suite with py313-ubuntu, mypyc-compiled	16m 6s
mypyc runtime tests with py310-ubuntu	7m 47s
Test suite with py311-ubuntu	9m 38s
	3h 45m 27s

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