Based on spec
support-OCI-image-registry-with-authentication-turned-on.rst
Each Helm chart can configure an OCI image registry and
credentials to use. A Kubernetes secret is then created with this
info. Service Accounts then specify an imagePullSecret specifying
the Secret with creds for the registry. Then any pod using one
of these ServiceAccounts may pull images from an authenticated
container registry.
Related OSH-infra change:
https://review.opendev.org/c/openstack/openstack-helm-infra/+/848142
Change-Id: I54540f14fed29622bc5af8d18939afd06d65e2d8
ced30abead