Tests

[mypyc] Fix non-deterministic compiler output due to frozensets #22560

Job	Run time
Test mypyc suite with 32-bit Python	11m 4s
Test suite with py314-ubuntu, mypyc-compiled	17m 10s
Parallel tests with py314-ubuntu, mypyc-compiled	27m 14s
Test suite with py313-ubuntu, mypyc-compiled	15m 56s
mypyc runtime tests with py313-macos	6m 27s
Test suite with py314t-ubuntu, mypyc-compiled	18m 3s
Test suite with py312-ubuntu	10m 37s
Test suite with py314-windows-64	31m 40s
Formatting and code style with Black + ruff	2m 1s
Type check our own code (py310-ubuntu)	1m 13s
mypyc runtime tests with py310-ubuntu	7m 48s
Parallel tests with py314-windows-64, interpreted	10m 58s
Type check our own code (py310-windows-64)	2m 24s
Parallel tests with py314-ubuntu, interpreted	26m 32s
Test suite with py311-ubuntu	9m 41s
Test suite with py315-ubuntu, mypyc-compiled	15m 35s
Test suite with py310-ubuntu, mypyc-compiled	17m 2s
	3h 51m 25s

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