Tests

Add draft version of 1.19 release notes (#20296) #19494

Job	Run time
Test mypyc suite with 32-bit Python	9m 16s
mypyc runtime tests with py313-macos	4m 10s
Test suite with py313-ubuntu, mypyc-compiled	14m 18s
Test suite with py311-ubuntu	9m 16s
Type check our own code (py39-ubuntu)	1m 39s
Test suite with py312-ubuntu, mypyc-compiled	14m 38s
Test suite with py314-windows-64	26m 50s
Test suite with py39-ubuntu, mypyc-compiled	14m 49s
Test suite with py310-ubuntu	12m 30s
mypyc runtime tests with py310-ubuntu	4m 42s
Formatting and code style with Black + ruff	1m 58s
Type check our own code (py39-windows-64)	2m 21s
Test suite with py314-ubuntu, mypyc-compiled	14m 35s
	2h 11m 2s

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