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.Shared/Actions/Components/SharedActionsComponent.cs

@@ -1,4 +1,4 @@
-#nullable enable
+#nullable enable
 using System;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
@@ -68,6 +68,7 @@ namespace Content.Shared.Actions.Components
 
         protected override void Startup()
         {
+            base.Startup();
             foreach (var actionType in InnateActions)
             {
                 Grant(actionType);