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/GameObjects/Components/PA/ParticleAcceleratorPartComponent.cs

@@ -1,6 +1,5 @@
 #nullable enable
 using Robust.Shared.GameObjects;
-using Robust.Shared.Log;
 using Robust.Shared.ViewVariables;
 
 namespace Content.Server.GameObjects.Components.PA
@@ -8,14 +7,13 @@ namespace Content.Server.GameObjects.Components.PA
     public abstract class ParticleAcceleratorPartComponent : Component
     {
         [ViewVariables] public ParticleAcceleratorControlBoxComponent? Master;
-        [ViewVariables] protected SnapGridComponent? SnapGrid;
 
         public override void Initialize()
         {
             base.Initialize();
             // FIXME: this has to be an entity system, full stop.
 
-            Owner.EnsureComponent<SnapGridComponent>(out SnapGrid);
+            Owner.Transform.Anchored = true;
         }
 
         public override void HandleMessage(ComponentMessage message, IComponent? component)