remove kube-rbac-proxy sidecar

[eguzki]

What

Remove the kube-rbac-proxy container

#7 (comment)

Why

See:

• Delete kube-rbac-proxy container from controller-manager 3scale/3scale-operator#692
• Disable kube-rbac-proxy from prometheus-exporter-operator controller-manager 3scale-ops/prometheus-exporter-operator#26

Verification steps

make kind-create-cluster
make deploy

kubectl port-forward --namespace kuadrant-system service/kuadrant-operator-controller-manager-metrics-service 8080:8080

No need to add RBAC access token

$ curl http://127.0.0.1:8080/metrics
# HELP controller_runtime_active_workers Number of currently used workers per controller
# TYPE controller_runtime_active_workers gauge
controller_runtime_active_workers{controller="kuadrant"} 0
....