[O11y][AWS CloudTrail] Migrate AWS CloudTrail dashboard visualizations to lenses in Kibana 8.7.1 (#6374)

* Migrate AWS CloudTrail dashboard visualizations to lenses.

* update changelog.yml

* update color palette to default for all visualizations

Author: harnish-crest-data

packages/aws/changelog.yml

@@ -1,4 +1,9 @@
 # newer versions go on top
+- version: "1.40.4"
+  changes:
+    - description: Migrate AWS CloudTrail dashboard visualizations to lenses.
+      type: enhancement
+      link: https://github.com/elastic/integrations/pull/6374
 - version: "1.40.3"
   changes:
     - description: Add fields metric type to usage, dynamoDB and ELB data streams.