Vulkan: Migrate buffers between memory types to improve GPU performance (#4540)

* Initial implementation of migration between memory heaps

- Missing OOM handling
- Missing `_map` data safety when remapping
  - Copy may not have completed yet (needs some kind of fence)
  - Map may be unmapped before it is done being used. (needs scoped access)
- SSBO accesses are all "writes" - maybe pass info in another way.
- Missing keeping map type when resizing buffers (should this be done?)

* Ensure migrated data is in place before flushing.

* Fix issue where old waitable would be signalled.

- There is a real issue where existing Auto<> references need to be replaced.

* Swap bound Auto<> instances when swapping buffer backing

* Fix conversion buffers

* Don't try move buffers if the host has shared memory.

* Make GPU methods return PinnedSpan with scope

* Storage Hint

* Fix stupidity

* Fix rebase

* Tweak rules

Attempt to sidestep BOTW slowdown

* Remove line

* Migrate only when command buffers flush

* Change backing swap log to debug

* Address some feedback

* Disallow backing swap when the flush lock is held by the current thread

* Make PinnedSpan from ReadOnlySpan explicitly unsafe

* Fix some small issues

- Index buffer swap fixed
- Allocate DeviceLocal buffers using a separate block list to images.

* Remove alternative flags

* Address feedback

Ryujinx.Graphics.Vulkan/PipelineBase.cs

@@ -1297,6 +1297,25 @@ namespace Ryujinx.Graphics.Vulkan
             SignalStateChange();
         }
 
+        public void SwapBuffer(Auto<DisposableBuffer> from, Auto<DisposableBuffer> to)
+        {
+            _indexBuffer.Swap(from, to);
+
+            for (int i = 0; i < _vertexBuffers.Length; i++)
+            {
+                _vertexBuffers[i].Swap(from, to);
+            }
+
+            for (int i = 0; i < _transformFeedbackBuffers.Length; i++)
+            {
+                _transformFeedbackBuffers[i].Swap(from, to);
+            }
+
+            _descriptorSetUpdater.SwapBuffer(from, to);
+
+            SignalCommandBufferChange();
+        }
+
         public unsafe void TextureBarrier()
         {
             MemoryBarrier memoryBarrier = new MemoryBarrier()