INC-675 Add warning not to modify properties managed by Redpanda programs (#197)

* add warning messages for cleanup policy

* code review comments

* Make warning more generic

* minor rewording

* rename message

* make consistent with docs repo messaging

* point playbook to docs branch

* revert changes to local playbook

Author: asimms41

modules/develop/pages/managed-connectors/index.adoc

@@ -23,3 +23,5 @@ target system. Sink connectors read the data from Redpanda and transform it into
 a format that the target system can use.
 
 These sources and sinks work together to create a data pipeline that can move and transform data from one system to another.
+
+include::develop:partial$topic-properties-warning.adoc[]

modules/develop/partials/topic-properties-warning.adoc

@@ -0,0 +1 @@
+WARNING: Modifying the properties of topics that are created and managed by Redpanda applications can cause unexpected errors. This may lead to connector and cluster failures.

modules/get-started/pages/create-topic.adoc

@@ -4,7 +4,9 @@
 
 
 
-After creating a cluster, you can create a topic for that cluster. Topic properties are populated from information stored in the broker. For Dedicated and BYOC clusters, you can optionally overwrite the default settings. 
+After creating a cluster, you can create a topic for that cluster. Topic properties are populated from information stored in the broker. For Dedicated and BYOC clusters, you can optionally overwrite the default settings.
+
+include::develop:partial$topic-properties-warning.adoc[]
 
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