AGENT-1431: Backport feature NoRegistryClusterInstall to 4.21#10250

pawanpinjarkar wants to merge 3 commits intoopenshift:release-4.21openshift/installer:release-4.21from

pawanpinjarkar:cherrypick-agent-1309-And-1425pawanpinjarkar/installer:cherrypick-agent-1309-And-1425Copy head branch name to clipboard