Call reload protoypes on admin changes (#13160)

* Call reload protoypes on admin changes

Fixes NPCs not working after engine change.

* Also chems

* other fixes

Content.Shared/Administration/IGamePrototypeLoadManager.cs

@@ -4,6 +4,4 @@ public interface IGamePrototypeLoadManager
 {
     public void Initialize();
     public void SendGamePrototype(string prototype);
-
-    event Action GamePrototypeLoaded;
 }