Engine Entity Anchoring Changes (#4195)

* Converted all SnapGridPositionChangedEvent subscriptions to AnchorStateChangedEvent.

* Fixes power tests with new anchored requirements.

* Moved AnchorableComponent into construction.
AnchorableComponent now uses Transform.Anchored.

* Fixed bug with nodes, power works again.

* Adds lifetime stages to Component.

* Update Engine to v0.4.70.

Content.Client/IconSmoothing/IconSmoothComponent.cs

@@ -59,7 +59,7 @@ namespace Content.Client.IconSmoothing
         /// </summary>
         internal int UpdateGeneration { get; set; }
 
-        public override void Initialize()
+        protected override void Initialize()
         {
             base.Initialize();
 
@@ -263,7 +263,7 @@ namespace Content.Client.IconSmoothing
             }
         }
 
-        public void SnapGridOnPositionChanged()
+        public void AnchorStateChanged()
         {
             if (Owner.Transform.Anchored)
             {