Generate the release manifests pointing to registry.k8s.io

[mkumatag]

/kind bug
/area provider/ibmcloud

What steps did you take and what happened:
right now release manifests are pointing to the gcr.io staging repo, make/scripts needs to be modified to point to the appropriate production registry.

What did you expect to happen:

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

Environment:

• Cluster-api version:
• Minikube/KIND version:
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):

[pjsharath28]

/assign