Tests

[mypyc] Specialize `s[i] == 'x'` to a codepoint int compare #22472

Job	Run time
Test mypyc suite with 32-bit Python	11m 48s
mypyc runtime tests with py313-macos	7m 17s
Test suite with py312-ubuntu	10m 39s
Test suite with py314t-ubuntu, mypyc-compiled	17m 43s
Test suite with py313-ubuntu, mypyc-compiled	15m 44s
Test suite with py315-ubuntu, mypyc-compiled	16m 11s
Test suite with py314-ubuntu, mypyc-compiled	15m 31s
mypyc runtime tests with py310-ubuntu	7m 28s
Parallel tests with py314-ubuntu, interpreted	25m 33s
Formatting and code style with Black + ruff	1m 49s
Test suite with py310-ubuntu, mypyc-compiled	17m 4s
Type check our own code (py310-ubuntu)	1m 5s
Parallel tests with py314-ubuntu, mypyc-compiled	28m 2s
Type check our own code (py310-windows-64)	2m 6s
Parallel tests with py314-windows-64, interpreted	11m 26s
Test suite with py311-ubuntu	9m 15s
Test suite with py314-windows-64	32m 15s
	3h 50m 56s

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