rsx: Clean up window management code

- Removes a lot of wm_event code that was used to perform window management and is no longer needed.
- Significantly simplifies the vulkan code.
- Implements resource management when vulkan window is minimized to allow resources to be freed.

rpcs3/Emu/RSX/GSRender.cpp

@@ -1,4 +1,4 @@
-#include "stdafx.h"
+#include "stdafx.h"
 #include "Emu/Memory/vm.h"
 #include "Emu/System.h"
 
@@ -41,8 +41,6 @@ void GSRender::on_exit()
 {
 	if (m_frame)
 	{
-		m_frame->disable_wm_event_queue();
-		m_frame->clear_wm_events();
 		m_frame->delete_context(m_context);
 		m_context = nullptr;
 	}