[Starlingx-discuss] New registries: registry.k8s.io & icr.io and associated images

[Khalil, Ghada]

Hello all,
Recent commits introduced support for two new registries:

- registry.k8s.io: This is required for the k8s-security-profiles-operator (SPO) containerized app being introduced in stx.9.0
   Story: https://storyboard.openstack.org/#!/story/2010310
   Review for new registry: https://review.opendev.org/q/topic:registry-k8s-io
   New images:
   - registry.k8s.io/security-profiles-operator/security-profiles-operator:v0.6.0
   - gcr.io/kubebuilder/kube-rbac-proxy:v0.13.1

- icr.io: This is required for the portieris fluxcd app being upversioned in stx.9.0
   Story: https://storyboard.openstack.org/#!/story/2010394
   Review adding the new registry: https://review.opendev.org/q/topic:icr-io
   New images: 
   - icr.io/portieris/portieris:v0.13.1

Neither registry is required for bootstrapping the system, so if you have no plan to use the above optional applications, this should not affect you.
If you have interest in these applications and use a private registry, please populate it accordingly.

Regards,
Ghada