Refactor actions to be entities with components (#19900)

Content.Server/Polymorph/Components/PolymorphableComponent.cs

@@ -1,4 +1,3 @@
-using Content.Shared.Actions.ActionTypes;
 using Content.Shared.Polymorph;
 using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.List;
 
@@ -11,7 +10,7 @@ namespace Content.Server.Polymorph.Components
         /// A list of all the polymorphs that the entity has.
         /// Used to manage them and remove them if needed.
         /// </summary>
-        public Dictionary<string, InstantAction>? PolymorphActions = null;
+        public Dictionary<string, EntityUid>? PolymorphActions = null;
 
         /// <summary>
         /// The polymorphs that the entity starts out being able to do.