Tests

Implement bytes.startswith in mypyc #19690

Job	Run time
Test mypyc suite with 32-bit Python	2m 28s
Test suite with py311-ubuntu	2m 36s
Test suite with py312-ubuntu	2m 38s
Test suite with py310-ubuntu, mypyc-compiled	2m 34s
mypyc runtime tests with py313-macos	2m 45s
Test suite with py314-ubuntu, mypyc-compiled	2m 36s
Test suite with py314-windows-64	2m 30s
Parallel tests with py314-ubuntu, mypyc-compiled	2m 38s
Parallel tests with py314-ubuntu, interpreted	2m 37s
Test suite with py313-ubuntu, mypyc-compiled	2m 36s
Formatting and code style with Black + ruff	1m 57s
Type check our own code (py310-ubuntu)	1m 47s
Type check our own code (py310-windows-64)	2m 30s
mypyc runtime tests with py310-ubuntu	2m 39s
Test suite with py314t-ubuntu, mypyc-compiled	2m 35s
	37m 26s

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