feat: Add support for labels in automations (#11658)

- Add support for using labels as an action event for automation
 - Fix duplicated conversation_updated event dispatch for labels
 

Fixes https://github.com/chatwoot/chatwoot/issues/8539 and multiple
issues around duplication related to label change events.
---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/javascript/dashboard/i18n/locale/en/automation.json

@@ -177,7 +177,8 @@
       "REFERER_LINK": "Referrer Link",
       "ASSIGNEE_NAME": "Assignee",
       "TEAM_NAME": "Team",
-      "PRIORITY": "Priority"
+      "PRIORITY": "Priority",
+      "LABELS": "Labels"
     }
   }
 }