OggStreamer refactor (MonoGame#8747)

I've noticed that ```OpenALSoundController``` had useless references to
```OggStreamer``` (likely from an old refactor). I also moved
```OggStream``` to the Media folder since it is only related to
```Song.NVorbis``` and renamed it to ```OggStream.NVorbis``` to make it
more clear what goes with what.

Author: ThomasFOG

MonoGame.Framework/MonoGame.Framework.DesktopGL.csproj

@@ -25,7 +25,6 @@
     </PackageReference>
     <PackageReference Include="MonoGame.Library.SDL" Version="2.32.2.1" />
     <PackageReference Include="MonoGame.Library.OpenAL" Version="1.23.1.10" />
-    <PackageReference Include="NVorbis" Version="0.10.4" />
   </ItemGroup>
 
   <ItemGroup>
@@ -45,10 +44,16 @@
   <ItemGroup>
     <Compile Remove="Graphics\GraphicsAdapter.cs" />
   </ItemGroup>
+  
+  <!-- Song support with Vorbis, depends on OpenAL -->
+  <ItemGroup>
+    <PackageReference Include="NVorbis" Version="0.10.4" />
+    <Compile Include="Platform\Media\OggStream.NVorbis.cs" />
+    <Compile Include="Platform\Media\Song.NVorbis.cs" />
+  </ItemGroup>
 
   <ItemGroup>
     <Compile Include="Platform\TitleContainer.Desktop.cs" />
-    <Compile Include="Platform\Audio\OggStream.cs" />
     <Compile Include="Platform\Audio\Xact\WaveBank.Default.cs" />
     <Compile Include="Platform\Graphics\OpenGL.Common.cs" />
     <Compile Include="Platform\Graphics\Texture2D.StbSharp.cs" />
@@ -62,7 +67,6 @@
     <Compile Include="Platform\Utilities\ReflectionHelpers.Default.cs" />
     <Compile Include="Platform\Media\MediaLibrary.Default.cs" />
     <Compile Include="Platform\Media\MediaPlayer.Default.cs" />
-    <Compile Include="Platform\Media\Song.NVorbis.cs" />
     <Compile Include="Platform\Media\VideoPlayer.Default.cs" />
     <Compile Include="Platform\Media\Video.Default.cs" />
     <Compile Include="Platform\Input\GamePad.SDL.cs" />

MonoGame.Framework/Platform/Audio/OpenALSoundController.cs

@@ -92,8 +92,6 @@ internal sealed class OpenALSoundController : IDisposable
         private const int DEFAULT_FREQUENCY = 48000;
         private const int DEFAULT_UPDATE_SIZE = 512;
         private const int DEFAULT_UPDATE_BUFFER_COUNT = 2;
-#elif DESKTOPGL
-        private static OggStreamer _oggstreamer;
 #endif
         private List<int> availableSourcesCollection;
         private List<int> inUseSourcesCollection;
@@ -270,9 +268,6 @@ Now use OpenSL ES to create an AudioPlayer with PCM buffer queue data locator.
 #endif
 
                 _context = Alc.CreateContext(_device, attribute);
-#if DESKTOPGL
-                _oggstreamer = new OggStreamer();
-#endif
 
                 AlcHelper.CheckError("Could not create OpenAL context");
 
@@ -386,10 +381,6 @@ void Dispose(bool disposing)
             {
                 if (disposing)
                 {
-#if DESKTOPGL
-                    if(_oggstreamer != null)
-                        _oggstreamer.Dispose();
-#endif
                     for (int i = 0; i < allSourcesArray.Length; i++)
                     {
                         AL.DeleteSource(allSourcesArray[i]);