Unrevert audio (#21330)

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

Content.Server/Salvage/Expeditions/SalvageExpeditionComponent.cs

@@ -39,7 +39,7 @@ public sealed partial class SalvageExpeditionComponent : SharedSalvageExpedition
     /// <summary>
     /// Countdown audio stream.
     /// </summary>
-    public IPlayingAudioStream? Stream = null;
+    public EntityUid? Stream = null;
 
     /// <summary>
     /// Sound that plays when the mission end is imminent.

Content.Server/Salvage/SalvageSystem.Expeditions.cs

@@ -73,7 +73,7 @@ public sealed partial class SalvageSystem
 
     private void OnExpeditionShutdown(EntityUid uid, SalvageExpeditionComponent component, ComponentShutdown args)
     {
-        component.Stream?.Stop();
+        component.Stream = _audio.Stop(component.Stream);
 
         foreach (var (job, cancelToken) in _salvageJobs.ToArray())
         {

Content.Server/Salvage/SalvageSystem.Runner.cs

@@ -153,7 +153,7 @@ public sealed partial class SalvageSystem
             else if (comp.Stage < ExpeditionStage.MusicCountdown && remaining < TimeSpan.FromMinutes(2))
             {
                 // TODO: Some way to play audio attached to a map for players.
-                comp.Stream = _audio.PlayGlobal(comp.Sound, Filter.BroadcastMap(Comp<MapComponent>(uid).MapId), true);
+                comp.Stream = _audio.PlayGlobal(comp.Sound, Filter.BroadcastMap(Comp<MapComponent>(uid).MapId), true).Value.Entity;
                 comp.Stage = ExpeditionStage.MusicCountdown;
                 Dirty(uid, comp);
                 Announce(uid, Loc.GetString("salvage-expedition-announcement-countdown-minutes", ("duration", TimeSpan.FromMinutes(2).Minutes)));

Content.Server/Salvage/SalvageSystem.cs

@@ -27,6 +27,8 @@ using Content.Shared.Random;
 using Content.Shared.Random.Helpers;
 using Content.Shared.Tools.Components;
 using Robust.Server.Maps;
+using Robust.Shared.Audio;
+using Robust.Shared.Audio.Systems;
 using Robust.Shared.Map.Components;
 using Robust.Shared.Timing;