[PlanarProbe] Don't active planar probe when deactivated

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/PlanarReflectionProbe.cs

 
         public void RequestRealtimeRender()
         {
-            if (enabled)
+            if (isActiveAndEnabled)
                 ReflectionSystem.RequestRealtimeRender(this);
         }
 
 
         void OnValidate()
         {
-            if (enabled)
-            {
-                ReflectionSystem.UnregisterProbe(this);
+            ReflectionSystem.UnregisterProbe(this);
+
+            if (isActiveAndEnabled)
-            }
         }
     }
 }