This container can be pulled via:
  docker pull registry.opensuse.org/isv/rancher/harvester/containers/v1.7/15.7/suse/sles/15.7/virt-handler:1.6.3
  docker pull registry.opensuse.org/isv/rancher/harvester/containers/v1.7/15.7/suse/sles/15.7/virt-handler:1.6.3-150700.2.3
  docker pull registry.opensuse.org/isv/rancher/harvester/containers/v1.7/15.7/suse/sles/15.7/virt-handler:1.6.3.32.11.6

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.