Add attribute to hide arbitrary drawables from draw visualiser

[smoogipoo]

When trying to use the draw visualiser during gameplay, you can't target anything other than the cursor trail.

diff --git a/osu.Game.Rulesets.Osu/UI/Cursor/CursorTrail.cs b/osu.Game.Rulesets.Osu/UI/Cursor/CursorTrail.cs
index a4bccb0aff..5132dc2859 100644
--- a/osu.Game.Rulesets.Osu/UI/Cursor/CursorTrail.cs
+++ b/osu.Game.Rulesets.Osu/UI/Cursor/CursorTrail.cs
@@ -14,6 +14,7 @@
 using osu.Framework.Graphics.Shaders;
 using osu.Framework.Graphics.Shaders.Types;
 using osu.Framework.Graphics.Textures;
+using osu.Framework.Graphics.Visualisation;
 using osu.Framework.Input;
 using osu.Framework.Input.Events;
 using osu.Framework.Timing;
@@ -23,6 +24,7 @@
 
 namespace osu.Game.Rulesets.Osu.UI.Cursor
 {
+    [DrawVisualiserHidden]
     public partial class CursorTrail : Drawable, IRequireHighFrequencyMousePosition
     {
         private const int max_sprites = 2048;