Tests

Better support for `SomeEnum.item == some_literal` #19175

Job	Run time
Test mypyc suite with 32-bit Python	10m 6s
Type check our own code (py39-ubuntu)	1m 36s
Test suite with py314-windows-64	25m 43s
Test suite with py310-ubuntu	10m 50s
mypyc runtime tests with py39-macos	8m 21s
Test suite with py312-ubuntu, mypyc-compiled	13m 43s
Test suite with py39-ubuntu, mypyc-compiled	14m 29s
Test suite with py311-ubuntu	8m 31s
Test suite with py313-ubuntu, mypyc-compiled	14m 4s
Test suite with py314-ubuntu, mypyc-compiled	13m 57s
Type check our own code (py39-windows-64)	2m 17s
Formatting and code style with Black + ruff	1m 55s
	2h 5m 32s

Provide feedback