fix: migrate kube-rbac-proxy image from deprecated gcr.io to registry.k8s.io

[amit-darji]

What was changed

Updated the kube-rbac-proxy sidecar image reference in the Helm chart from:

gcr.io/kubebuilder/kube-rbac-proxy

to:

registry.k8s.io/kubebuilder/kube-rbac-proxy

Why?

The gcr.io registry is being discontinued. The kube-rbac-proxy project has officially announced the deprecation of gcr.io/kubebuilder/kube-rbac-proxy in favour of registry.k8s.io — the community-maintained Kubernetes image registry.
Continuing to use the old registry risks image pull failures on new installs or pod restarts once the registry is fully decommissioned, leading to silent deployment breakages.
Ref: https://github.com/kubernetes-sigs/kubebuilder/blob/master/designs/discontinue_usage_of_kube_rbac_proxy.md

Checklist

1. Closes

2. How was this tested:

• Verified image is pullable from registry.k8s.io/kubebuilder/kube-rbac-proxy
• Ran helm template to confirm chart renders correctly with the updated image reference
• Deployed to a test cluster and confirmed kube-rbac-proxy sidecar starts successfully

3. Any docs updates needed?

This is an internal image reference change with no user-facing configuration impact.

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[gabriel-yahav]

@amit-darji
Thanks !
Will it be possible, once the PR is merge, to release a version of the chart with the fix ?
It affects my current running pods as I'm getting ImagePullBackOff at the moment.

[carlydf]

@gabriel-yahav, yes we will do a release once this is fixed! Sorry this slipped through the cracks. I also added a new CI check to make sure image-pull errors won't happen again with this chart.

@amit-darji I can merge this as soon as you sign the CLA

[kianjones9]

thanks for fixing!

[jinjiaKarl]

Thanks for fixing it!

[nikoul]

Thank you, I have the same ImagePullBackOff issue other people described.

[Shivs11]

@amit-darji - would be awesome if you can sign the CLA! we would love to get this in before @carlydf's #222 gets in!