Add positional sound support for all rulesets

The SamplePlaybackBalance is calculated in a way that the balance
remains between -0.4 and 0.4.
Positional sound is not supported in osu!taiko.

osu.Game.Rulesets.Catch/Objects/Drawables/DrawableCatchHitObject.cs

@@ -70,6 +70,8 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawables
 
         public float DisplayRadius => DrawSize.X / 2 * Scale.X * HitObject.Scale;
 
+        protected override float SamplePlaybackBalance => 0.8f * HitObject.X - 0.4f;
+
         protected DrawableCatchHitObject(CatchHitObject hitObject)
             : base(hitObject)
         {