Add missing barriers around CmdFillBuffer (fixes Monster Hunter Rise flickering on NVIDIA)

Ryujinx.Graphics.Vulkan/PipelineBase.cs

@@ -140,7 +140,29 @@ namespace Ryujinx.Graphics.Vulkan
 
             var dst = Gd.BufferManager.GetBuffer(CommandBuffer, destination, true).Get(Cbs, offset, size).Value;
 
+            BufferHolder.InsertBufferBarrier(
+                Gd,
+                Cbs.CommandBuffer,
+                dst,
+                BufferHolder.DefaultAccessFlags,
+                AccessFlags.AccessTransferWriteBit,
+                PipelineStageFlags.PipelineStageAllCommandsBit,
+                PipelineStageFlags.PipelineStageTransferBit,
+                offset,
+                size);
+
             Gd.Api.CmdFillBuffer(CommandBuffer, dst, (ulong)offset, (ulong)size, value);
+
+            BufferHolder.InsertBufferBarrier(
+                Gd,
+                Cbs.CommandBuffer,
+                dst,
+                AccessFlags.AccessTransferWriteBit,
+                BufferHolder.DefaultAccessFlags,
+                PipelineStageFlags.PipelineStageTransferBit,
+                PipelineStageFlags.PipelineStageAllCommandsBit,
+                offset,
+                size);
         }
 
         public unsafe void ClearRenderTargetColor(int index, ColorF color)

Ryujinx.Graphics.Vulkan/PipelineFull.cs

@@ -192,7 +192,7 @@ namespace Ryujinx.Graphics.Vulkan
 
             if (componentMask != 0xf)
             {
-                // We can't use CmdClearAttachments if the clear has a custom scissor or is not writing all components,
+                // We can't use CmdClearAttachments if not writing all components,
                 // because on Vulkan, the pipeline state does not affect clears.
                 var dstTexture = FramebufferParams.GetAttachment(index);
                 if (dstTexture == null)