Vulkan: Amend header includes

Adds headers where necessary to eliminate indirect includes.
Also adds headers to ensure certain standard constructs always
resolve correctly

Source/Core/VideoBackends/Vulkan/VertexManager.h

@@ -4,8 +4,10 @@
 
 #pragma once
 
+#include <memory>
 #include <vector>
 
+#include "Common/CommonTypes.h"
 #include "VideoCommon/VertexManagerBase.h"
 
 namespace Vulkan