Move support buffer update out of the backends (#5411)

* Move support buffer update out of the backends

* Fix render scale init and remove redundant state from SupportBufferUpdater

* Stop passing texture scale to the backends

* XML docs for SupportBufferUpdater

src/Ryujinx.Graphics.Gpu/GpuContext.cs

@@ -85,6 +85,11 @@ namespace Ryujinx.Graphics.Gpu
         /// </summary>
         internal ConcurrentDictionary<ulong, PhysicalMemory> PhysicalMemoryRegistry { get; }
 
+        /// <summary>
+        /// Support buffer updater.
+        /// </summary>
+        internal SupportBufferUpdater SupportBufferUpdater { get; }
+
         /// <summary>
         /// Host hardware capabilities.
         /// </summary>
@@ -125,6 +130,8 @@ namespace Ryujinx.Graphics.Gpu
 
             PhysicalMemoryRegistry = new ConcurrentDictionary<ulong, PhysicalMemory>();
 
+            SupportBufferUpdater = new SupportBufferUpdater(renderer);
+
             _firstTimestamp = ConvertNanosecondsToTicks((ulong)PerformanceCounter.ElapsedNanoseconds);
         }
 
@@ -399,6 +406,8 @@ namespace Ryujinx.Graphics.Gpu
                 physicalMemory.Dispose();
             }
 
+            SupportBufferUpdater.Dispose();
+
             PhysicalMemoryRegistry.Clear();
 
             RunDeferredActions();