update MG C tests #6717

Job	Run time
telemetry-setup	6s
changed-files / Check changed files	14s
devcontainer / amd64, 12.5, conda	35m 12s
checks / other-checks	40s
devcontainer / amd64, 12.5, pip	1h 1m 53s
checks / check-style	2m 23s
wheel-build-pylibcugraph	0s
conda-cpp-build	0s
conda-python-build	0s
conda-cpp-tests	0s
conda-cpp-checks	0s
wheel-build-cugraph	0s
wheel-tests-pylibcugraph	0s
conda-python-tests	0s
conda-notebook-tests	0s
docs-build	0s
wheel-tests-cugraph	0s
pr-builder / run	1s
telemetry-summarize	1s
	1h 40m 30s

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