Description of problem: Autogenerated unbound service account token `observability-alertmanager-accessor-token`  in RHACM 2.13.

Version-Release number of selected component (if applicable): 4.14+

How reproducible: Always

Steps to Reproduce:

1.  Install Advanced Cluster Management for Kubernetes 2.13.z version on OCP versions 4.14+. 
2. Create multiclusterhub resource in open-cluster-management namespace
3. Enable observability by creating  MultiClusterObservability resource in open-cluster-management-observability namespace. As soon as I created this resource, multiple SA token secrets were created automatically, and observability-alertmanager-accessor-token is one of them:

{{% oc get secrets
observability-alertmanager-accessor-token kubernetes.io/service-account-token 4 3m16s}}

Actual results: 

Expected results:

Additional info: