Remove default grids (content) (#2241)

* Default grids go poof

* Address review

* Update submodule

* Fix DoAfterSystem for entities without grid.

* Fix SubFloorHideSystem for entities without grid.

* Fix ExplosionHelper for coordinates that aren't in a grid

* Fix TurfHelpers' GetWorldTileBox crash in the case of invalid grid

* Fix tile prying component crash when trying to pry space.

* Spill fixes when passing coordinates without grids.

* Are you static'in, son?

* Change SaveLoadSaveTest grid Id hardcoded value
It's still hardcoded, but at least now it's correct!

* Only send debug AI thing if grid is not invalid

* Update submodule.

Co-authored-by: Pieter-Jan Briers <pieterjan.briers+git@gmail.com>

Content.Server/GameObjects/EntitySystems/AI/Pathfinding/Accessible/AiReachableSystem.cs

@@ -621,7 +621,7 @@ namespace Content.Server.GameObjects.EntitySystems.AI.Pathfinding.Accessible
         /// <param name="chunk"></param>
         private void GenerateRegions(PathfindingChunk chunk)
         {
-            // Grid deleted while update queued.
+            // Grid deleted while update queued, or invalid grid.
             if (!_mapManager.TryGetGrid(chunk.GridId, out _))
             {
                 return;
@@ -688,7 +688,8 @@ namespace Content.Server.GameObjects.EntitySystems.AI.Pathfinding.Accessible
         private void SendDebugMessage(PlayerAttachSystemMessage message)
         {
             var playerGrid = message.Entity.Transform.GridID;
-            SendRegionsDebugMessage(playerGrid);
+            if(playerGrid.IsValid())
+                SendRegionsDebugMessage(playerGrid);
         }
 
         private void SendRegionsDebugMessage(GridId gridId)