Tests

[mypyc]: support :s and :d in generate_format_ops #20007

Job	Run time
Test mypyc suite with 32-bit Python	9m 22s
Test suite with py310-ubuntu, mypyc-compiled	1m 10s
Type check our own code (py310-ubuntu)	1m 38s
Test suite with py312-ubuntu	10m 23s
Test suite with py314-windows-64	26m 38s
Formatting and code style with Black + ruff	1m 53s
Test suite with py313-ubuntu, mypyc-compiled	1m 4s
Test suite with py314-ubuntu, mypyc-compiled	1m 4s
Parallel tests with py314-ubuntu, interpreted	22m 29s
Parallel tests with py314-ubuntu, mypyc-compiled	1m 3s
Type check our own code (py310-windows-64)	2m 45s
mypyc runtime tests with py310-ubuntu	5m 26s
Test suite with py311-ubuntu	9m 7s
Test suite with py314t-ubuntu, mypyc-compiled	1m 17s
mypyc runtime tests with py313-macos	7m 6s
	1h 42m 25s

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