[DOCS] Remove default modules from plugin docs (#69304) (#69360)

Author: jrodewig

docs/plugins/alerting.asciidoc

@@ -14,7 +14,7 @@ must be installed on every node in the cluster. After installation, each
 node must be restarted before the plugin becomes visible.
 
 NOTE: A full cluster restart is required for installing plugins that have
-custom cluster state metadata, such as X-Pack. It is still possible to upgrade
+custom cluster state metadata. It is still possible to upgrade
 such plugins with a rolling restart.
 
 This documentation distinguishes two categories of plugins:
@@ -40,8 +40,6 @@ include::plugin-script.asciidoc[]
 
 include::api.asciidoc[]
 
-include::alerting.asciidoc[]
-
 include::analysis.asciidoc[]
 
 include::discovery.asciidoc[]
@@ -50,12 +48,8 @@ include::filesystem.asciidoc[]
 
 include::ingest.asciidoc[]
 
-include::management.asciidoc[]
-
 include::mapper.asciidoc[]
 
-include::security.asciidoc[]
-
 include::repository.asciidoc[]
 
 include::store.asciidoc[]

docs/plugins/index.asciidoc

@@ -37,7 +37,3 @@ The following plugin has been contributed by our community:
 * https://github.com/johtani/elasticsearch-ingest-csv[Ingest CSV Processor Plugin] (by Jun Ohtani)
 
 include::ingest-attachment.asciidoc[]
-
-include::ingest-geoip.asciidoc[]
-
-include::ingest-user-agent.asciidoc[]

docs/plugins/ingest-geoip.asciidoc

@@ -40,9 +40,34 @@ The `cloud-gce` plugin has been renamed to <<discovery-gce>> (`discovery-gce`).
 The Delete-By-Query plugin has been removed in favor of a new {ref}/docs-delete-by-query.html[Delete By Query API]
 implementation in core.
 
+[role="exclude",id="ingest-geoip"]
+=== Ingest `geoip` processor plugin
 
+The `geoip` processor is now a module and distributed with {es} by default. See
+{ref}/geoip-processor.html[GeoIP processor].
 
+[role="exclude",id="ingest-user-agent"]
+=== Ingest `user_agent` processor plugin
 
+The `user_agent` processor is now a module and distributed with {es} by default.
+See {ref}/user-agent-processor.html[User Agent processor].
 
+[role="exclude",id="using-ingest-geoip"]
+=== Using the `geoip` processor in a pipeline
 
+See {ref}/geoip-processor.html#using-ingest-geoip[using `ingest-geoip`].
 
+[role="exclude",id="alerting"]
+=== Alerting plugins
+
+See {kib}'s {kibana-ref}/alerting-getting-started.html[Alerting and Actions].
+
+[role="exclude",id="management"]
+=== Management plugins
+
+See {ref}/monitor-elasticsearch-cluster.html[{stack} monitoring].
+
+[role="exclude",id="security"]
+=== Security plugins
+
+See {ref}/secure-cluster.html[{stack} security].