activitypub: utils: rework make_flag_data to accept either activity payloads or IRIs

lib/pleroma/web/activity_pub/utils.ex

@@ -621,7 +621,12 @@ def make_create_data(params, additional) do
   #### Flag-related helpers
 
   def make_flag_data(params, additional) do
-    status_ap_ids = Enum.map(params.statuses || [], & &1.data["id"])
+    status_ap_ids =
+      Enum.map(params.statuses || [], fn
+        act when is_map(act) -> act["id"]
+        act when is_binary(act) -> act
+      end)
+
     object = [params.account.ap_id] ++ status_ap_ids
 
     %{