Unrevert audio (#21330)

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

Content.Server/Atmos/Components/GasTankComponent.cs

@@ -30,8 +30,8 @@ namespace Content.Server.Atmos.Components
 
         // Cancel toggles sounds if we re-toggle again.
 
-        public IPlayingAudioStream? ConnectStream;
-        public IPlayingAudioStream? DisconnectStream;
+        public EntityUid? ConnectStream;
+        public EntityUid? DisconnectStream;
 
         [DataField("air"), ViewVariables(VVAccess.ReadWrite)]
         public GasMixture Air { get; set; } = new();