SnapGridComponent Removal (#3884)

* Removed SnapGridOffset, there is only center now.

* SnapGridComponent methods are now static.

* Removed SnapGridComponent.OnPositionChanged.

* Refactored static functions off SnapGridComponent to MapGrid.
Refactored away usages of SnapGridComponent.Position.

* Added Transform.Anchored for checking if an entity is a tile entity.
More refactoring for static MapGrid functions.

* Static snapgrid methods on MapGrid are no longer static.

* Add setter to ITransformComponent.Anchored.
Removed direct references to SnapGridComponent from content.

* Grid functions now deal with EntityUids instead of SnapGridComponents.
Began renaming public API functions from SnapGrid to Anchor.

* Remove the SnapGridComponent 'Offset' field from all yaml files. This was removed in code previously, so the yaml linter was upset.

* Update engine submodule to v0.4.46.

Content.Server/Commands/GameTicking/TileWallsCommand.cs

@@ -90,7 +90,7 @@ namespace Content.Server.Commands.GameTicking
                     continue;
                 }
 
-                if (!childEntity.TryGetComponent(out SnapGridComponent? snapGrid))
+                if (!childEntity.Transform.Anchored)
                 {
                     continue;
                 }