add test for biased random walks #6747

Job	Run time
telemetry-setup	4s
changed-files / Check changed files	18s
checks / check-style	2m 7s
checks / other-checks	39s
devcontainer / amd64, 12.5, conda	32m 40s
devcontainer / amd64, 12.5, pip	37m 44s
conda-cpp-build	0s
wheel-build-pylibcugraph	0s
conda-cpp-checks	0s
conda-cpp-tests	0s
conda-python-build	0s
wheel-build-cugraph	0s
wheel-tests-pylibcugraph	0s
docs-build	0s
conda-notebook-tests	0s
conda-python-tests	0s
wheel-tests-cugraph	0s
pr-builder / run	1s
telemetry-summarize	17s
	1h 13m 50s

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