Unrevert audio (#21330)

Co-authored-by: Pieter-Jan Briers <pieterjan.briers@gmail.com>

Content.Server/Anomaly/Components/GeneratingAnomalyGeneratorComponent.cs

@@ -13,5 +13,5 @@ public sealed partial class GeneratingAnomalyGeneratorComponent : Component
     [DataField("endTime", customTypeSerializer: typeof(TimeOffsetSerializer))]
     public TimeSpan EndTime = TimeSpan.Zero;
 
-    public IPlayingAudioStream? AudioStream;
+    public EntityUid? AudioStream;
 }