Reconcile HRs with valueFrom automatically

[onedr0p]

Describe the bug or feature request

Upcoming feature from Flux is that it will be able to reconcile HRs with valueFrom when a annotation is set on the secret/configmap. This removes the need to have a kustomizeconfig patch.

fluxcd/flux2#5446

Code of Conduct

• I agree to follow this project's Code of Conduct

[onedr0p]

Partly done in #9671. Patch needed on the flux-instance Helm values when 2.7.0 drops

- # Watch configmaps and secrets attached to HelmReleases and Kustomizations
  patch: |
    - op: add
      path: /spec/template/spec/containers/0/args/-
      value: --watch-configs-label-selector=owner!=helm
  target:
    kind: Deployment
    name: (helm-controller|kustomize-controller)