The current failures appear to be tied to the must-gather pod: https://search.ci.openshift.org/?search=Managed+cluster+should+ensure+pods+use+downstream+images+from+our+release+image+with+proper+ImagePullPolicy&maxAge=48h&context=1&type=bug%2Bjunit&name=%5Erelease&maxMatches=5&maxBytes=20971520&groupBy=job I assume this is a result of the pod that is created by "oc must-gather" not setting the expected imagepull policy, so setting this to the oc team. Either the test should be made tolerant of that particular pod, or oc must-gather should be updated to set the expected policy.
link to sample job: https://prow.ci.openshift.org/view/gs/origin-ci-test/logs/release-openshift-origin-installer-e2e-gcp-4.6/1301212438615560192 note that in this job it showed up as a flake (the test got rerun and i guess the must-gather pod was gone by the time the second attempt checked)
*** This bug has been marked as a duplicate of bug 1874856 ***