Merge repair and rearm anim traits into WithResupplyAnimation

This is the safest approach to avoid conflicts/visual glitches when the host is responsible for both resupply types.
The new trait will simply play a looping animation as long as the actor is resupplying in any form.

OpenRA.Mods.Common/Activities/Repair.cs

@@ -137,5 +137,12 @@ namespace OpenRA.Mods.Common.Activities
 			foreach (var depot in host.Actor.TraitsImplementing<INotifyRepair>())
 				depot.AfterRepair(host.Actor, self);
 		}
+
+		protected override void OnActorDispose(Actor self)
+		{
+			// If the actor died (or will be disposed directly) this tick, Activity.TickOuter won't be ticked again,
+			// so we need to run OnLastRun directly (otherwise it would be skipped completely).
+			OnLastRun(self);
+		}
 	}
 }