[O11y][Docker] Migrate Docker Overview dashboard to lens (#7942)

* Migrate Docker Overview dashboard to lens

* Update changelog

* Remove converted from panel titles

* Update manifest

Author: rajvi-patel-22

packages/docker/changelog.yml

@@ -1,4 +1,9 @@
 # newer versions go on top
+- version: "2.8.3"
+  changes:
+    - description: Migrate Docker Overview dashboard to lens.
+      type: enhancement
+      link: https://github.com/elastic/integrations/pull/7942
 - version: "2.8.2"
   changes:
     - description: Fix mapping for `message` to align with ECS.