Monitoring operator degraded as alertmanager and thanosruler can't reconcile in RHOCP 4

Issue

• Monitoring operator reports degraded:

  $ oc get co monitoring
  NAME         VERSION   AVAILABLE   PROGRESSING   DEGRADED   SINCE
  monitoring   4.14.12   False       True          True       3d2h
  

• Monitoring operator reports below status messages:

  $ oc get co monitoring -o json | jq .status.conditions
  {
  "lastTransitionTime": "2024-03-01T08:04:07Z",
  "message": "waiting for Alertmanager object changes failed: waiting for Alertmanager openshift-monitoring/main: context deadline exceeded, waiting for ThanosRuler object changes failed: waiting for Thanos Ruler openshift-user-workload-monitoring/user-workload: context deadline exceeded",
  "reason": "MultipleTasksFailed",
  "status": "False",
  "type": "Available"
  },
  {
  "lastTransitionTime": "2024-03-01T08:04:07Z",
  "message": "waiting for Alertmanager object changes failed: waiting for Alertmanager openshift-monitoring/main: context deadline exceeded, waiting for ThanosRuler object changes failed: waiting for Thanos Ruler openshift-user-workload-monitoring/user-workload: context deadline exceeded",
  "reason": "MultipleTasksFailed",
  "status": "True",
  "type": "Degraded"
  }