Clean up all missing EntitySystem proxy method uses (#38353)

Content.Shared/Magic/SharedMagicSystem.cs

@@ -359,7 +359,7 @@ public abstract class SharedMagicSystem : EntitySystem
             var component = (Component)Factory.GetComponent(name);
             var temp = (object)component;
             _seriMan.CopyTo(data.Component, ref temp);
-            EntityManager.AddComponent(target, (Component)temp!);
+            AddComp(target, (Component)temp!);
         }
     }