CNTRLPLANE-1275: set up openshift-tests-extension and add a sanity test#859

openshift-merge-bot[bot] merged 3 commits intoopenshift:masteropenshift/cluster-kube-controller-manager-operator:masterfrom

gangwgr:test-extd-cleangangwgr/cluster-kube-controller-manager-operator:test-extd-cleanCopy head branch name to clipboard