Description of problem:

Customers can disable metrics collection on all managed clusters by setting spec.observabilityAddonSpec.enableMetrics: false in MCO CR. This cleans up metrics collection stack on managed clusters, and also reverts alert forwarding configuration in CMO config map on the managed clusters.

However, it fails to revert CMO config from hub clusters. Even setting {{mco-disable-alerting: true }}also does not clear the CMO config on the hub cluster.

Version-Release number of selected component (if applicable): ACM 2.14

How reproducible:

Steps to Reproduce:

1.  Set {{spec.observabilityAddonSpec.enableMetrics: false }}in MCO CR

Actual results:

1. Metrics collection stack (endpoint operator, metrics collectors) removed from hub and managed clusters. 
2. Alert forwarding config from CMO config maps removed form managed clusters
3. Alert forwarding config in CMO for hub cluster not reverted

Expected results:

     CMO Alert forwarding config from hub should be reverted.

Additional info: