Tests

Add await to empty context hack #17796

Job	Run time
Test mypyc suite with 32-bit Python	9m 27s
Test suite with py39-ubuntu, mypyc-compiled	16m 22s
Test suite with py310-ubuntu	10m 31s
Test suite with py311-ubuntu	8m 36s
Test suite with py313-windows-64	22m 44s
Test suite with py314-dev-ubuntu	16m 56s
Test suite with py312-ubuntu, mypyc-compiled	16m 29s
Formatting and code style with Black + ruff	1m 48s
Test suite with py313-ubuntu, mypyc-compiled	15m 46s
mypyc runtime tests with py39-macos	5m 46s
Type check our own code (py39-windows-64)	2m 22s
Type check our own code (py39-ubuntu)	1m 38s
	2h 8m 25s

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