Description of problem:

upgrade rollback 4.6->4.7->4.6 fails when rolling back to 4.6. The cluster
version log [0] shows the upgrade rollback process happening:

     "history": [
                    {
                        "completionTime": null,
                        "image": "registry.svc.ci.openshift.org/ci-op-fj8z0c6x/release@sha256:6ddbf56b7f9776c0498f23a54b65a06b3b846c1012200c5609c4bb716b6bdcdf",
                        "startedTime": "2020-12-11T15:06:56Z",
                        "state": "Partial",
                        "verified": false,
                        "version": "4.6.8"
                    },
                    {
                        "completionTime": "2020-12-11T15:06:56Z",
                        "image": "registry.svc.ci.openshift.org/ci-op-fj8z0c6x/release@sha256:91bd93a846989e40440c7ac93f566c4cb9bdd13878efbad829424dae34b091bd",
                        "startedTime": "2020-12-11T14:06:22Z",
                        "state": "Partial",
                        "verified": false,
                        "version": "4.7.0-0.ci-2020-12-10-144849"
                    },
                    {
                        "completionTime": "2020-12-11T14:00:22Z",
                        "image": "registry.svc.ci.openshift.org/ci-op-fj8z0c6x/release@sha256:6ddbf56b7f9776c0498f23a54b65a06b3b846c1012200c5609c4bb716b6bdcdf",
                        "startedTime": "2020-12-11T13:29:28Z",
                        "state": "Completed",
                        "verified": false,
                        "version": "4.6.8"
                    }
                ],


and the failure cause is also shown:

                    {
                        "lastTransitionTime": "2020-12-11T16:17:03Z",
                        "message": "Could not update prometheusrule \"openshift-cluster-version/cluster-version-operator\" (9 of 617): the server is reporting an internal error",
                        "reason": "UpdatePayloadClusterError",
                        "status": "True",
                        "type": "Failing"
                    },
                    {
                        "lastTransitionTime": "2020-12-11T14:06:22Z",
                        "message": "Unable to apply 4.6.8: the control plane is reporting an internal error",
                        "reason": "UpdatePayloadClusterError",
                        "status": "True",
                        "type": "Progressing"
                    }


[0]   https://gcsweb-ci.apps.ci.l2s4.p1.openshiftapps.com/gcs/origin-ci-test/logs/release-openshift-origin-installer-e2e-aws-upgrade-rollback-4.6-to-4.7/1337381727240196096/artifacts/e2e-aws-upgrade/gather-extra/clusterversion.json



Version-Release number of selected component (if applicable):

rollback from 4.7 to 4.6


How reproducible:

unsure, as the job that failed has just recently been improved to gather logs.


Steps to Reproduce:

run this job:

  https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/release-openshift-origin-installer-e2e-aws-upgrade-rollback-4.6-to-4.7



Additional info:

originally this was discussed in https://bugzilla.redhat.com/show_bug.cgi?id=1893348, but that is now closed as it was really
tracking the fact that we did not collect logs in this failing 4.6->4.7->4.6 job.

also, two slack threads that may or may not help:
  https://coreos.slack.com/archives/C01CQA76KMX/p1607713778276800
  https://coreos.slack.com/archives/C0VMT03S5/p1607715542396800