Ensure all references to k8s.gcr.io re replaced with registry.k8s.io

Summary

Context: gitlab-org&7599 (comment 1097391531)

https://kubernetes.io/blog/2022/08/23/kubernetes-v1-25-release/#moved-container-registry-service-from-k8s-gcr-io-to-registry-k8s-io

Moving container registry from k8s.gcr.io to registry.k8s.io got merged. For more details, see the wiki page, announcement was sent to the kubernetes development mailing list.

Our forked NGINX Chart is the only component referencing the old registry. Newer versions of that chart correctly reference registry.k8s.io. We'll need to update the chart to reflect that.

Acceptance criteria

Edited by Mitchell Nielsen