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.Server/Portal/Components/PortalComponent.cs

@@ -33,7 +33,7 @@ namespace Content.Server.Portal.Components
         public readonly List<IEntity> ImmuneEntities = new(); // K
         [ViewVariables(VVAccess.ReadWrite)] [DataField("alive_time")] private float _aliveTime = 10f;
 
-        public override void OnAdd()
+        protected override void OnAdd()
         {
             // This will blow up an entity it's attached to
             base.OnAdd();