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/Weapon/Ranged/Barrels/Components/ServerRangedBarrelComponent.cs

@@ -132,7 +132,7 @@ namespace Content.Server.Weapon.Ranged.Barrels.Components
             }
         }
 
-        public override void OnAdd()
+        protected override void OnAdd()
         {
             base.OnAdd();
 
@@ -143,7 +143,7 @@ namespace Content.Server.Weapon.Ranged.Barrels.Components
             rangedWeaponComponent.WeaponCanFireHandler += WeaponCanFire;
         }
 
-        public override void OnRemove()
+        protected override void OnRemove()
         {
             base.OnRemove();
             if (Owner.TryGetComponent(out ServerRangedWeaponComponent? rangedWeaponComponent))