update Fuse Online chapter in using Prometheus and Grafana

As requested by Matej in https://issues.redhat.com/browse/ENTESB-17674, we need to move the information from the release notes to the Fuse Online install guide. Please do this for both Fuse 7.10 and 7.11.

1. git checkout a working branch (fusedoc-4940) from the fuse-7.10 branch.

2.  In section 4.2. "Monitoring Fuse Online integrations and infrastructure components with Prometheus" of the Installing and Operating Fuse Online in OpenShift Container Platform.
https://access.redhat.com/documentation/en-us/red_hat_fuse/7.10/html/installing_and_operating_fuse_online_on_openshift_container_platform/managing-fuse-online-on-ocp_ocp#monitor-integrations-on-ocp_manage

source file: installing-and-operating-fuse-online-on-ocp/modules/fuse-online-installing/proc-monitor-integrations-on-ocp.adoc

Delete the following sections:

• Prerequisites
• procedure steps 1-4

3. Cut the content from the Fuse 7.10 release notes:
section 2.6.1. Adding Fuse Online monitoring resources (Prometheus and Grafana) on OCP 4.9 (or later)`
https://access.redhat.com/documentation/en-us/red_hat_fuse/7.10/html/release_notes_for_red_hat_fuse_7.10/onlinedistrib#adding_fuse_online_monitoring_resources_prometheus_and_grafana_on_ocp_4_9_or_later

source file: release-notes/topics/online-distrib.adoc

4. Paste that copied content into proc-monitor-integrations-on-ocp.adoc, above the remaining step 5 (To access Grafana dashboards)

5. Edit proc-monitor-integrations-on-ocp.adoc that Matej lists in FUSEDOC-4939.

When it is all reviewed and ready to go, you can try to cherry-pick it to 7.11 or if needed, you'll need these steps repeat for a new branch based on 7.11

If you have any questions, let me know.

Also, I'm happy to review the MR when you are ready.