tidy instructions for shadowing (#1549)

Co-authored-by: Kat Batuigas <36839689+kbatuigas@users.noreply.github.com>

Author: paulohtb6

modules/manage/pages/disaster-recovery/shadowing/setup.adoc

@@ -44,31 +44,11 @@ ifndef::env-cloud[]
 - You must have xref:get-started:licensing/overview.adoc[Enterprise Edition] licenses on both clusters. 
 endif::[]
 
-=== Cluster properties
+=== Cluster configuration
 
-Both source and shadow clusters must have the xref:reference:properties/cluster-properties.adoc#enable_shadow_linking[`enable_shadow_linking`] cluster property set to `true`. 
-
-ifdef::env-cloud[]
-[NOTE]
-====
-Starting with Redpanda v25.3, this cluster property is enabled by default on new Redpanda Cloud clusters. Existing clusters created before v25.3 must enable this property manually. See xref:manage:cluster-maintenance/config-cluster.adoc[].
-====
-endif::[]
+include::manage:partial$shadowing/shadow-link-prerequisites.adoc[tag=cluster-property]
 
 ifndef::env-cloud[]
-To enable this property, run: 
-[,bash]
-----
-rpk cluster config set enable_shadow_linking true
-----
-
-[NOTE]
-====
-This cluster property must be configured using `rpk` or the Admin API v1 before you can create shadow links through any interface.
-====
-
-To learn more about configuring cluster properties, see xref:manage:cluster-maintenance/cluster-property-configuration.adoc[].
-
 === Administrative access
 
 Superuser access is required on both clusters through xref:get-started:rpk/index.adoc[`rpk`], the Admin API, or xref:console:index.adoc[Redpanda Console] to create and manage shadow links.

modules/manage/pages/kubernetes/shadowing/k-shadow-linking.adoc

@@ -42,41 +42,6 @@ For Kubernetes-specific networking configuration, see xref:manage:kubernetes/net
 
 Deploy both your source and shadow Redpanda clusters with Shadowing enabled. See xref:deploy:deployment-option/self-hosted/kubernetes/k-deployment-overview.adoc[Deploy Redpanda in Kubernetes] for full deployment instructions.
 
-IMPORTANT: Both clusters must have `enable_shadow_linking: true` in their cluster configuration to support Shadowing.
-
-To enable Shadowing, set the `enable_shadow_linking` cluster property in your cluster configuration:
-
-[tabs]
-======
-Operator::
-+
---
-In your `Redpanda` CRD, set:
-
-[,yaml]
-----
-spec:
-  clusterSpec:
-    config:
-      cluster:
-        enable_shadow_linking: true
-----
---
-
-Helm::
-+
---
-In your Helm values file, set:
-
-[,yaml]
-----
-config:
-  cluster:
-    enable_shadow_linking: true
-----
---
-======
-
 == Create a shadow link
 
 In the examples, `<shadow-namespace>` represents the namespace where your shadow Redpanda cluster is deployed, and `<source-namespace>` represents the namespace where your source Redpanda cluster is deployed. The shadow cluster and its associated resources (shadow links, secrets) should be deployed in the same namespace as the shadow cluster.

modules/manage/partials/shadowing/shadow-link-prerequisites.adoc

@@ -1,5 +1,12 @@
 // tag::cluster-property[]
-Both source and shadow clusters must have the xref:reference:properties/cluster-properties.adoc#enable_shadow_linking[`enable_shadow_linking`] cluster property set to `true`.
+The shadow cluster must have the xref:reference:properties/cluster-properties.adoc#enable_shadow_linking[`enable_shadow_linking`] cluster property set to `true`.
+
+ifdef::env-cloud[]
+[NOTE]
+====
+Starting with Redpanda v25.3, this cluster property is enabled by default on new Redpanda Cloud clusters. For existing clusters on versions earlier than v25.3, you must enable this property manually. See xref:manage:cluster-maintenance/config-cluster.adoc[].
+====
+endif::[]
 
 ifdef::env-kubernetes[]
 [tabs]
@@ -39,6 +46,7 @@ config:
 endif::[]
 
 ifndef::env-kubernetes[]
+ifndef::env-cloud[]
 To enable this property, run:
 [,bash]
 ----
@@ -50,8 +58,10 @@ rpk cluster config set enable_shadow_linking true
 This cluster property must be configured using `rpk` or the Admin API v1 before you can create shadow links through any interface.
 ====
 
+
 To learn more about configuring cluster properties, see xref:manage:cluster-maintenance/cluster-property-configuration.adoc[].
 endif::[]
+endif::[]
 // end::cluster-property[]
 
 // tag::replication-permissions[]