[OSDOCS-12826]: Adding link to HCP-specific ACM doc from OCP docs

Author: lahinson

hosted_control_planes/index.adoc

@@ -10,6 +10,7 @@ toc::[]
 
 include::modules/hosted-control-planes-overview.adoc[leveloffset=+1]
 include::modules/hcp-mce-acm-relationship-intro.adoc[leveloffset=+1]
+include::modules/hcp-acm-discover.adoc[leveloffset=+2]
 include::modules/hosted-control-planes-version-support.adoc[leveloffset=+1]
 
 [role="_additional-resources"]

modules/hcp-acm-discover.adoc

@@ -0,0 +1,9 @@
+// Module included in the following assemblies:
+//
+// * hosted_control_planes/index.adoc
+
+:_mod-docs-content-type: CONCEPT
+[id="hcp-acm-discover_{context}"]
+= Discovering {mce-short} hosted clusters in {rh-rhacm}
+
+If you want to bring hosted clusters to a {rh-rhacm-first} hub cluster to manage them with {rh-rhacm} management components, see the instructions in the link:https://docs.redhat.com/en/documentation/red_hat_advanced_cluster_management_for_kubernetes/2.11/html/clusters/cluster_mce_overview#discover-hosted-acm[{rh-rhacm-title} official documentation].