Tests

Allow literals as kwargs dict keys #19780

Job	Run time
Test mypyc suite with 32-bit Python	9m 12s
Test suite with py313-ubuntu, mypyc-compiled	13m 52s
Test suite with py314t-ubuntu, mypyc-compiled	16m 0s
Test suite with py311-ubuntu	9m 2s
Test suite with py314-ubuntu, mypyc-compiled	14m 30s
Parallel tests with py314-ubuntu, mypyc-compiled	25m 13s
Test suite with py314-windows-64	26m 35s
Type check our own code (py310-windows-64)	2m 37s
Type check our own code (py310-ubuntu)	1m 38s
Test suite with py310-ubuntu, mypyc-compiled	14m 1s
Formatting and code style with Black + ruff	1m 58s
Test suite with py312-ubuntu	9m 47s
Parallel tests with py314-ubuntu, interpreted	21m 59s
mypyc runtime tests with py313-macos	7m 14s
mypyc runtime tests with py310-ubuntu	5m 10s
	2h 58m 48s

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