Fix Erronius entity deletion on grid deletion from SetTiles() (#6367)

Don't delete the grid *before* we raise the event???

Co-authored-by: Princess Cheeseballs <66055347+Pronana@users.noreply.github.com>

Robust.Shared/GameObjects/Systems/SharedMapSystem.Grid.cs

@@ -876,12 +876,12 @@ public abstract partial class SharedMapSystem
             chunk.SuppressCollisionRegeneration = false;
         }
 
-        RegenerateCollision(uid, grid, modified);
-
         // Notify of all tile changes in one event
         var ev = new TileChangedEvent((uid, grid), tileChanges.ToArray());
         RaiseLocalEvent(uid, ref ev, true);
 
+        RegenerateCollision(uid, grid, modified);
+
         // Back to normal
         MapManager.SuppressOnTileChanged = false;
     }