Vulkan: Fix buffer texture storage not being updated on buffer handle reuse (#3731)

Ryujinx.Graphics.Vulkan/BufferManager.cs

@@ -38,6 +38,8 @@ namespace Ryujinx.Graphics.Vulkan
 
         private readonly IdList<BufferHolder> _buffers;
 
+        public int BufferCount { get; private set; }
+
         public StagingBuffer StagingBuffer { get; }
 
         public BufferManager(VulkanRenderer gd, PhysicalDevice physicalDevice, Device device)
@@ -56,6 +58,8 @@ namespace Ryujinx.Graphics.Vulkan
                 return BufferHandle.Null;
             }
 
+            BufferCount++;
+
             ulong handle64 = (uint)_buffers.Add(holder);
 
             return Unsafe.As<ulong, BufferHandle>(ref handle64);