[8.15] [Docs] Update troubleshooting with remote monitoring info - re…

…do (#192223) (#192226)

# Backport

This will backport the following commits from `main` to `8.15`:
- [[Docs] Update troubleshooting with remote monitoring info - redo
(#192223)](#192223)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
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Update troubleshooting with remote monitoring info - redo
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Co-authored-by: wajihaparvez <[email protected]>

docs/user/monitoring/monitoring-troubleshooting.asciidoc

@@ -65,3 +65,5 @@ monitoring data for other products in the cluster.
 . Set the time filter to “Last 1 hour”.  When monitoring data appears in your
 cluster, the page automatically refreshes with the monitoring summary.
 
+. If using {agent}, ensure that all integration assets have been installed in
+the monitoring cluster.