[fortinet_fortimanager] Generate processor tags and normalize error handler (#15542)

- Generate tags for processors missing tags
- Normalize the pipeline error handler
- Removed duplicate processors

Author: taylor-swanson

packages/fortinet_fortimanager/changelog.yml

@@ -1,4 +1,9 @@
 # newer versions go on top
+- version: "2.16.2"
+  changes:
+    - description: Generate processor tags and normalize error handler.
+      type: enhancement
+      link: https://github.com/elastic/integrations/pull/15542
 - version: "2.16.1"
   changes:
     - description: Changed owners.