[elastic_agent] Fix Overview dashboard hiding data due to an unintended default filter (#19121)

Author: mauri870

packages/elastic_agent/changelog.yml

@@ -1,4 +1,9 @@
 # newer versions go on top
+- version: "2.9.1"
+  changes:
+    - description: Fix Overview dashboard hiding data due to an unintended default filter.
+      type: bugfix
+      link: "https://github.com/elastic/integrations/issues/18941"
 - version: "2.9.0"
   changes:
     - description: Add TSDB dimensions and complete/fix metric_type declarations across elastic_agent metrics data streams.

packages/elastic_agent/kibana/dashboard/elastic_agent-a148dc70-6b3c-11ed-98de-67bdecd21824.json

@@ -28,7 +28,6 @@
                 "9b87225b-2e22-4928-99aa-7317b14f1455": {
                     "explicitInput": {
                         "enhancements": {},
-                        "existsSelected": true,
                         "fieldName": "host.os.type",
                         "grow": true,
                         "id": "9b87225b-2e22-4928-99aa-7317b14f1455",

packages/elastic_agent/manifest.yml

@@ -1,6 +1,6 @@
 name: elastic_agent
 title: Elastic Agent
-version: 2.9.0
+version: 2.9.1
 description: Collect logs and metrics from Elastic Agents.
 type: integration
 format_version: 3.6.0