Review required RBAC permissions

[JorTurFer]

Report

Currently, KEDA operator has permissions in cluster RBAC which aren't required
For example:

- apiGroups:
  - ""
  resources:
  - configmaps
  - configmaps/status
  - events
  verbs:
  - '*'

AFAIK, KEDA doesn't need * over configMaps across all the cluster. We should revisit all the permissions and check if they are really required or not

[tomkerkhove]

Let's try to do this before 2.13 ships!

[JorTurFer]

Let me open the release issue to start tracking pending things to do