Add overview paragraph directly in self-managed version of page

Author: kbatuigas

modules/manage/pages/mountable-topics.adoc

@@ -4,4 +4,6 @@
 :page-categories: Management
 :env-linux: true
 
+For topics with Tiered Storage enabled, you can unmount a topic to safely detach it from a cluster and keep the topic data in the cluster's object storage bucket or container. You can mount the detached topic to either the same origin cluster, or a different one. This allows you to hibernate a topic and free up system resources taken up by the topic, or migrate a topic to a different cluster.
+
 include::manage:partial$mountable-topics.adoc[]

modules/manage/partials/mountable-topics.adoc

@@ -1,5 +1,3 @@
-For topics with Tiered Storage enabled, you can unmount a topic to safely detach it from a cluster and keep the topic data in the cluster's object storage bucket or container. You can mount the detached topic to either the same origin cluster, or a different one. This allows you to hibernate a topic and free up system resources taken up by the topic, or migrate a topic to a different cluster.
-
 == Prerequisites
 
 [NOTE]
@@ -9,13 +7,15 @@ include::shared:partial$enterprise-license.adoc[]
 
 ifndef::env-cloud[]
 . xref:get-started:rpk-install.adoc[Install `rpk`], or ensure that you have access to the Admin API.
+. Enable xref:manage:tiered-storage.adoc[Tiered Storage] for specific topics, or for the entire cluster (all topics).
 endif::[]
 ifdef::env-cloud[]
 . xref:manage:rpk/rpk-install.adoc[Install `rpk`] to run cluster mount and unmount operations on the command line, or xref:manage:api/cloud-api-authentication.adoc[authenticate] to the Cloud API and execute these operations programmatically.
 +
 If using the Cloud API, you'll make requests against Data Plane APIs. Make sure you xref:manage:api/cloud-dataplane-api.adoc#get-data-plane-api-url[retrieve the Data Plane API URL] and use this URL to perform a mount or unmount operation.
+. Enable xref:ROOT:manage:tiered-storage.adoc[Tiered Storage] for the topics you want to unmount or mount.
 endif::[]
-. Enable xref:manage:tiered-storage.adoc[Tiered Storage] for specific topics, or for the entire cluster (all topics).
+
 
 == Unmount a topic from a cluster to object storage