Mountable topics for cloud (#134)

* Test single sourcing in new branch

* Include directly from root partial

* Apply suggestions from code review

* Update mountable-topics.adoc

* Add overview paragraph to cloud version of page

* Revert local playbook content source branches

---------

Co-authored-by: Jake Cahill <[email protected]>
Co-authored-by: Joyce Fee <[email protected]>

Author: 3 people

modules/ROOT/nav.adoc

@@ -339,6 +339,7 @@
 
 * xref:manage:index.adoc[Manage]
 ** xref:manage:monitor-cloud.adoc[]
+** xref:manage:mountable-topics.adoc[]
 ** xref:manage:rpk/index.adoc[Redpanda CLI]
 *** xref:manage:rpk/intro-to-rpk.adoc[]
 *** xref:manage:rpk/rpk-install.adoc[]

modules/manage/pages/mountable-topics.adoc

@@ -0,0 +1,5 @@
+= Mountable Topics
+
+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 remount the detached topic to the origin cluster, allowing you to hibernate a topic and free up system resources taken up by the topic.
+
+include::24.3@ROOT:manage:partial$mountable-topics.adoc[]