[META - Phases]: Discontinue Kube RBAC Proxy in Default Kubebuilder Scaffolding

[camilamacedo86]

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What do you want to happen?

Address the phases and changes discussed in the proposal: https://github.com/kubernetes-sigs/kubebuilder/blob/master/designs/discontinue_usage_of_kube_rbac_proxy.md

• [x] - Phase 0: Remove the RBAC Proxy: PR: https://github.com/kubernetes-sigs/kubebuilder/pull/3899
• [x] - Phase 1: Transition to NetworkPolicies: PR: https://github.com/kubernetes-sigs/kubebuilder/pull/3853
• [ ] - Phase 2: Add Cert-Manager as Optional option to be used with metrics (help wanted) PS.: See that we should address the request made in: https://github.com/kubernetes-sigs/kubebuilder/issues/3657 within this one.
• [x] - Phase 3: Add Controller-Runtime feature. Details can be found in: https://kubernetes.slack.com/archives/CAR30FCJZ/p1716290359950339?thread_ts=1716289540.582639&cid=CAR30FCJZ -> DONE: PR: https://github.com/kubernetes-sigs/kubebuilder/pull/4003
• [ ] - Phase 4: When kube-rbac-proxy be accepted under the umbrella (Blocked by: https://github.com/brancz/kube-rbac-proxy/issues/238 and the project be part of the umbrella. When it happens we can reach out its maintainers and see if we can support them out to create the external plugin)

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