Tests

[mypyc] feat: make static literals immortal on Python3.14 #20376

Job	Run time
Test mypyc suite with 32-bit Python	8m 39s
Test suite with py311-ubuntu	10m 0s
Test suite with py314t-ubuntu, mypyc-compiled	17m 7s
Parallel tests with py314-ubuntu, interpreted	23m 20s
Formatting and code style with Black + ruff	1m 45s
Test suite with py312-ubuntu	10m 1s
Type check our own code (py310-ubuntu)	1m 41s
Test suite with py310-ubuntu, mypyc-compiled	15m 10s
Type check our own code (py310-windows-64)	2m 38s
Test suite with py313-ubuntu, mypyc-compiled	14m 42s
mypyc runtime tests with py310-ubuntu	5m 4s
Parallel tests with py314-ubuntu, mypyc-compiled	29m 3s
Test suite with py314-ubuntu, mypyc-compiled	14m 35s
Test suite with py314-windows-64	26m 50s
mypyc runtime tests with py313-macos	5m 19s
	3h 5m 54s

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