Run CRT tests

Use importlib for lazy calls #1980

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Run time

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Job	Run time
build (3.9, windows-latest)	13m 50s
build (3.10, windows-latest)	14m 3s
build (3.11, ubuntu-latest)	9m 31s
build (3.10, macOS-latest)	7m 27s
build (3.9, ubuntu-latest)	10m 10s
build (3.9, macOS-latest)	12m 0s
build (3.10, ubuntu-latest)	10m 53s
build (3.11, windows-latest)	12m 23s
build (3.12, ubuntu-latest)	9m 10s
build (3.11, macOS-latest)	5m 8s
build (3.13, ubuntu-latest)	8m 27s
build (3.12, windows-latest)	12m 20s
build (3.14, ubuntu-latest)	6m 52s
build (3.14, windows-latest)	10m 28s
build (3.12, macOS-latest)	5m 33s
build (3.14, macOS-latest)	6m 42s
build (3.13, macOS-latest)	5m 0s
build (3.13, windows-latest)	11m 11s
	2h 51m 8s