pass Actor to cartridge messages (#33210)

* pass Actor to cartridge messages

* NonSerialized gaming

---------

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Server/CartridgeLoader/CartridgeLoaderSystem.cs

@@ -422,6 +422,7 @@ public sealed class CartridgeLoaderSystem : SharedCartridgeLoaderSystem
     {
         var cartridgeEvent = args.MessageEvent;
         cartridgeEvent.LoaderUid = GetNetEntity(uid);
+        cartridgeEvent.Actor = args.Actor;
 
         RelayEvent(component, cartridgeEvent, true);
     }

Content.Shared/CartridgeLoader/CartridgeUiMessage.cs

@@ -17,4 +17,7 @@ public sealed class CartridgeUiMessage : BoundUserInterfaceMessage
 public abstract class CartridgeMessageEvent : EntityEventArgs
 {
     public NetEntity LoaderUid;
+
+    [NonSerialized]
+    public EntityUid Actor;
 }