Move kernel state out of the Horizon class (#1107)

* Move kernel state from Horizon to KernelContext

* Merge syscalls partial classes, split 32 and 64-bit variants

* Sort usings

Ryujinx.HLE/HOS/Services/Audio/AudioRendererManager/IAudioRenderer.cs

@@ -48,7 +48,7 @@ namespace Ryujinx.HLE.HOS.Services.Audio.AudioRendererManager
             IAalOutput             audioOut,
             AudioRendererParameter rendererParams)
         {
-            _updateEvent = new KEvent(system);
+            _updateEvent = new KEvent(system.KernelContext);
 
             _memory   = memory;
             _audioOut = audioOut;