This container can be pulled via:
  docker pull registry.opensuse.org/isv/rancher/harvester/containers/dev/15.7/suse/sles/15.7/virt-operator:1.6.3
  docker pull registry.opensuse.org/isv/rancher/harvester/containers/dev/15.7/suse/sles/15.7/virt-operator:1.6.3-150700.1.7
  docker pull registry.opensuse.org/isv/rancher/harvester/containers/dev/15.7/suse/sles/15.7/virt-operator:1.6.3.29.15.3

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.