chore: Change primary actor to Conversation for all the notification types. (#8435)

db/migrate/20231201014644_remove_notifications_with_message_primary_actor.rb

@@ -0,0 +1,5 @@
+class RemoveNotificationsWithMessagePrimaryActor < ActiveRecord::Migration[7.0]
+  def change
+    Migration::RemoveMessageNotifications.perform_later
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_11_29_091149) do
+ActiveRecord::Schema[7.0].define(version: 2023_12_01_014644) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_stat_statements"
   enable_extension "pg_trgm"