Receiving FluentdNodeDown alert for all the nodes in RHOCP4

Issue

• Continuously receiving FluentdNodeDown alerts.

• The collector svc is complaining about collector-metrics UID not being available

  $ oc get svc collector -o yaml -n openshift-logging
  ....
  ....
  service.alpha.openshift.io/serving-cert-generation-error: secret openshift-logging/collector-metrics
    does not have corresponding service UID bd289472-418b-402e-a51b-ed2473700b18
  service.alpha.openshift.io/serving-cert-generation-error-num: "10"
  service.alpha.openshift.io/serving-cert-secret-name: collector-metrics
  service.beta.openshift.io/serving-cert-generation-error: secret openshift-logging/collector-metrics
    does not have corresponding service UID bd289472-418b-402e-a51b-ed2473700b18
  ....
  ....