Propagate samples to strong nested hits too

The rationale is the same as in
6d325651dcca275091d51bbfbad3e59fa4ce4dc8. Due to the recursive nature of
`GameplaySampleTriggerSource.GetMostValidObject()`, in the case of
nested hits, drum rolls and drum roll ticks, the nested strong hits
would become the most valid object, and so without propagating
the samples down to that level too, nothing would play.

osu.Game.Rulesets.Taiko/Objects/DrumRoll.cs

@@ -107,7 +107,11 @@ namespace osu.Game.Rulesets.Taiko.Objects
 
         protected override HitWindows CreateHitWindows() => HitWindows.Empty;
 
-        protected override StrongNestedHitObject CreateStrongNestedHit(double startTime) => new StrongNestedHit { StartTime = startTime };
+        protected override StrongNestedHitObject CreateStrongNestedHit(double startTime) => new StrongNestedHit
+        {
+            StartTime = startTime,
+            Samples = Samples
+        };
 
         public class StrongNestedHit : StrongNestedHitObject
         {

osu.Game.Rulesets.Taiko/Objects/DrumRollTick.cs

@@ -33,7 +33,11 @@ namespace osu.Game.Rulesets.Taiko.Objects
 
         public override double MaximumJudgementOffset => HitWindow;
 
-        protected override StrongNestedHitObject CreateStrongNestedHit(double startTime) => new StrongNestedHit { StartTime = startTime };
+        protected override StrongNestedHitObject CreateStrongNestedHit(double startTime) => new StrongNestedHit
+        {
+            StartTime = startTime,
+            Samples = Samples
+        };
 
         public class StrongNestedHit : StrongNestedHitObject
         {

osu.Game.Rulesets.Taiko/Objects/Hit.cs

@@ -72,7 +72,11 @@ namespace osu.Game.Rulesets.Taiko.Objects
             }
         }
 
-        protected override StrongNestedHitObject CreateStrongNestedHit(double startTime) => new StrongNestedHit { StartTime = startTime };
+        protected override StrongNestedHitObject CreateStrongNestedHit(double startTime) => new StrongNestedHit
+        {
+            StartTime = startTime,
+            Samples = Samples
+        };
 
         public class StrongNestedHit : StrongNestedHitObject
         {