gaoning777: add preemptible vm and volume snapshot op sample tests

JobBuild
2149
09-17 23:30
kubeflow-pipeline-e2e-test 1174134487970222082 1174103538649796608 1174103410278928385
kubeflow-pipeline-sample-test 1174134487970222083 1174103538645602304 1174103410283122688
kubeflow-pipeline-upgrade-test 1174134487970222081 1174103538645602305 1174103410278928384