packages/apm: remove data streams in 8.15.0 (#9949)

* packages/apm: remove data streams in 8.15.0

As of elastic/elasticsearch#108860
(due to be released in 8.15.0), the apm-data Elasticsearch
plugin is enabled by default and will take care of installing
index templates and ingest pipelines for APM; the integration
package no longer needs to (nor should) install its own.

With this change, the integration package is optional for APM:
it is still useful for running with Fleet, but otherwise users
may rely on templates/pipelines being set up by Elasticsearch.

* Update docs

packages/apm/_dev/build/docs/README.md

@@ -2,30 +2,14 @@
 
 Elastic APM is an application performance monitoring system built on the Elastic Stack. It allows you to monitor software services and applications in real-time, by collecting detailed performance information on response time for incoming requests, database queries, calls to caches, external HTTP requests, and more.
 
-The APM integration installs templates and pipelines that validate and process APM data.
-To learn more about the APM Integration architecture, see [APM Components](https://ela.st/apm-components).
+The APM integration enables central management of APM Server with Fleet.
+To learn more, see [Fleet-managed APM Server](https://ela.st/apm-fleet).
 
 ### Quick start
 
 Ready to jump in? Read the [APM quick start](https://ela.st/quick-start-apm).
 
 ## Data Streams
 
-When using the APM integration, APM events are indexed into data streams.
+APM events are indexed into data streams.
 See [APM data streams](https://ela.st/apm-data-streams) for more information.
-
-### Traces
-
-{{fields "traces"}}
-
-### Application Metrics
-
-{{fields "app_metrics"}}
-
-### Internal Metrics
-
-{{fields "internal_metrics"}}
-
-### Application errors
-
-{{fields "error_logs"}}

packages/apm/changelog.yml

@@ -1,3 +1,8 @@
+- version: 8.15.0-preview-1716438434
+  changes:
+    - description: Remove data streams from integration package
+      type: enhancement
+      link: https://github.com/elastic/integrations/pull/9949
 - version: 8.13.1-preview-1708411360
   changes:
     - description: Remove version check