feat: Add the ability to self-assign conversations in macros (#8048)

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

spec/services/action_service_spec.rb

@@ -40,6 +40,4 @@ describe ActionService do
       expect(conversation.reload.assignee).to be_nil
     end
   end
-
-  # TODO: Expand this test suite
 end