KO-366: Replace kube-rbac-proxy functionality with controller-runtime authz/authn filters

[abhishekdwivedi3060]

• Removed kube-rbac-proxy usage across the project and replaced it with controller-runtime authz/authn filters
• Bumped operator-sdk to 1.39.1
• Removed support for deprecated ControllerManagerConfiguration struct and moved to flag based approach
• Moved webhook interface implementation from old deprecated to new CustomDefaulter and CustomerValidator interfaces
• Added scaffold for newly added NetworkPolicy
• Added scaffold for metric service with TLS integration with cert-manager

References:

1. Kubebuilder Cert-manager integration for metrics endpoint: ✨ (go/v4): feat/fix: enhance cert-manager integration for metrics endpoints (follow-up to PR #4243) kubernetes-sigs/kubebuilder#4400
2. Kubebuilder releases: https://github.com/kubernetes-sigs/kubebuilder/releases
3. Kubebuilder sample project: https://github.com/kubernetes-sigs/kubebuilder/tree/v4.4.0/testdata/project-v4
4. Kube-rbac-proxy discontinue design doc: https://github.com/kubernetes-sigs/kubebuilder/blob/master/designs/discontinue_usage_of_kube_rbac_proxy.md
5. Kubebuilder doc for kube-rbac-proxy migration: https://book.kubebuilder.io/reference/metrics#optional-by-using-network-policy-disabled-by-default

Work deferred for next release:

1. Move webhook code to internal pkg

TODO:

1. Test upgrade