March 18, 2025, Google's Container Registry will be shut down

[EmilienM]

Container Registry is deprecated and scheduled for shutdown. Artifact Registry now hosts images for the gcr.io domain by default in projects without previous Container Registry usage. After March 18, 2025, Container Registry will be shut down. To learn more about your options to upgrade to Artifact Registry, see Prepare for Container Registry shutdown.

https://console.cloud.google.com/gcr/images/k8s-staging-capi-openstack

We probably need to migrate it ourselves and update the docs.