This task is following the product doc section below. The `PodMonitor` custom resources are useful in OSSM sidecar mode metrics integration with OpenShift built-in monitoring. This task is about fixing any integration issue(s) and provide configuration improvement for OSSM 3 and OpenShift 4.19+.

Reference: https://docs.redhat.com/en/documentation/red_hat_openshift_service_mesh/3.1/html/observability/metrics-and-service-mesh

AC:

• Investigate metrics integration using `PodMonitor` resources with OSSM 3 sidecar mod.
• Fix configuration and doc examples.
• Provide a more readable and user friendly way of configuring Prometheus relabelings APIs.