Replace usage of Utils.ExtractArrayFromList with Span

Source/Engine/Renderer/Renderer.cs

@@ -1,6 +1,7 @@
 // Copyright (c) 2012-2022 Wojciech Figat. All rights reserved.
 
 using System.Collections.Generic;
+using System.Runtime.InteropServices;
 
 namespace FlaxEngine
 {
@@ -15,7 +16,7 @@ namespace FlaxEngine
         /// <param name="customActors">The custom set of actors to render. If empty, the loaded scenes will be rendered.</param>
         public static void DrawSceneDepth(GPUContext context, SceneRenderTask task, GPUTexture output, List<Actor> customActors)
         {
-            var temp = Utils.ExtractArrayFromList(customActors);
+            var temp = CollectionsMarshal.AsSpan(customActors).ToArray(); // FIXME
             var tempCount = temp.Length;
             Internal_DrawSceneDepth(FlaxEngine.Object.GetUnmanagedPtr(context), FlaxEngine.Object.GetUnmanagedPtr(task), FlaxEngine.Object.GetUnmanagedPtr(output), ref temp, ref tempCount);
         }