Description of problem:

After setting `observability.open-cluster-management.io/addon-source` annotation to "override" on an ObservabilityAddon CR for a managed cluster, this value gets reverted back to "mco" after a few minutes. Resulting in the overriden values being reverted back to those of the MCO.

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

ACM 2.13.4

How reproducible:

Always

Steps to Reproduce:

1. Update the ObservabilityAddon CR and change the  observability.open-cluster-management.io/addon-source annotation to "override"
2. Wait approximately 5 minutes and observe the annotation value gets reverted back to "mco".

Actual results:

When the annotation is reverted back to "mco", any overridden values in the CR get lost.

Expected results:

The MCO should not change the "override" annotation.

Additional info:

https://docs.redhat.com/en/documentation/red_hat_advanced_cluster_management_for_kubernetes/2.13/html-single/observability/index#obs-scale-metrics