Revert direct mem copy to fix perf regression

Author: xCollateral

src/main/java/net/vulkanmod/vulkan/memory/MemoryTypes.java

@@ -106,10 +106,7 @@ static abstract class MappableMemory extends MemoryType {
 
         @Override
         public void copyToBuffer(Buffer buffer, ByteBuffer src, long size, long srcOffset, long dstOffset) {
-            StagingBuffer stagingBuffer = Vulkan.getStagingBuffer();
-            stagingBuffer.copyBuffer((int) size, src);
-
-            DeviceManager.getTransferQueue().copyBufferCmd(stagingBuffer.getId(), stagingBuffer.getOffset(), buffer.getId(), dstOffset, size);
+            VUtil.memcpy(src, buffer, size, srcOffset, dstOffset);
         }
 
         @Override