[DOCS] Clarify changes in monitoring settings (elastic#15003)

* [DOCS] Clarify changes in monitoring settings

* Change topic names and order

* Add more fixes from the review

* Update libbeat/docs/monitoring/monitoring-beats.asciidoc

libbeat/docs/monitoring/monitoring-beats.asciidoc

@@ -9,18 +9,14 @@ You can use the {stack} {monitor-features} to gain insight into the health of
 {beatname_uc} agents running in your environment. 
 
 To monitor {beatname_uc}, make sure monitoring is enabled on your {es} cluster,
-then configure the method used to collect {beatname_uc} metrics. You
-ifndef::serverless[]
-can use one of following methods:
-endif::[]
-ifdef::serverless[]
-can use the following method:
-endif::[]
-
-* <<monitoring-internal-collection,Internal collection>>
-ifndef::serverless[]
-* <<monitoring-metricbeat-collection, {metricbeat} collection>>
-endif::[]
+then configure the method used to collect {beatname_uc} metrics. You can use one
+of following methods:
+
+* <<monitoring-internal-collection,Internal collection>> - Internal
+collectors send monitoring data directly to your monitoring cluster.
+* <<monitoring-internal-collection-legacy,Legacy internal collection (deprecated)>> - 
+Legacy internal collectors send monitoring data to your production cluster.
+
 
 To learn about monitoring in general, see 
 {stack-ov}/xpack-monitoring.html[Monitoring the {stack}]. 
@@ -29,6 +25,4 @@ To learn about monitoring in general, see
 
 include::monitoring-internal-collection.asciidoc[]
 
-ifndef::serverless[]
-include::monitoring-metricbeat.asciidoc[]
-endif::[]
+include::monitoring-internal-collection-legacy.asciidoc[]

libbeat/docs/monitoring/monitoring-internal-collection-legacy.asciidoc

@@ -0,0 +1,33 @@
+//////////////////////////////////////////////////////////////////////////
+//// This content is shared by all Elastic Beats. Make sure you keep the
+//// descriptions here generic enough to work for all Beats that include
+//// this file. When using cross references, make sure that the cross
+//// references resolve correctly for any files that include this one.
+//// Use the appropriate variables defined in the index.asciidoc file to
+//// resolve Beat names: beatname_uc and beatname_lc.
+//// Use the following include to pull this content into a doc file:
+//// include::../../libbeat/docs/monitoring/monitoring-internal-collection-legacy.asciidoc[]
+//////////////////////////////////////////////////////////////////////////
+
+[role="xpack"]
+[[monitoring-internal-collection-legacy]]
+== Use legacy internal collection to send monitoring data
+++++
+<titleabbrev>Legacy internal collection (deprecated)</titleabbrev>
+++++
+
+deprecated[7.2.0]
+
+In {beatname_uc} version 7.1 and earlier, you configured internal collectors
+that sent monitoring data to the production cluster, which would either index
+the data locally, or forward the data to a dedicated monitoring cluster via HTTP
+exporters.
+
+Starting in {beatname_uc} version 7.2, the legacy settings for internal
+collection are deprecated and will be removed in version 8.0.0. Instead of
+sending monitoring data to your production cluster, it's recommended that you
+use the configuration described under
+<<monitoring-internal-collection,internal collection>> to route
+monitoring data directly to your monitoring cluster.
+
+include::shared-monitor-config-legacy.asciidoc[]

libbeat/docs/monitoring/monitoring-internal-collection.asciidoc

@@ -11,16 +11,13 @@
 
 [role="xpack"]
 [[monitoring-internal-collection]]
-== Collect {beatname_uc} monitoring data with internal collectors
+== Use internal collection to send monitoring data
 ++++
 <titleabbrev>Internal collection</titleabbrev>
 ++++
 
-The following method involves sending the metrics to the production cluster, 
-which ultimately routes them to the monitoring cluster.
-ifndef::serverless[]
-For an alternative method, see <<monitoring-metricbeat-collection>>.
-endif::[]
+Use internal collectors to send {beats} monitoring data directly to your
+monitoring cluster.
 
 To learn about monitoring in general, see 
 {stack-ov}/xpack-monitoring.html[Monitoring the {stack}].