[enterprise-4.4] Adding certificate docs#22061

ahardin-rh merged 1 commit intoopenshift:enterprise-4.4openshift/openshift-docs:enterprise-4.4from

openshift-cherrypick-robot:cherry-pick-18254-to-enterprise-4.4openshift-cherrypick-robot/openshift-docs:cherry-pick-18254-to-enterprise-4.4Copy head branch name to clipboard