rsx: Async shader compilation

- Defer compilation process to worker threads
- vulkan: Fixup for graphics_pipeline_state.
  Never use struct assignment operator on vk** structs due to padding after sType member (4 bytes)

rpcs3/main.cpp

@@ -93,6 +93,7 @@ int main(int argc, char** argv)
 
 	QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
 	QCoreApplication::setAttribute(Qt::AA_DisableWindowContextHelpButton);
+	QCoreApplication::setAttribute(Qt::AA_DontCheckOpenGLContextThreadAffinity);
 
 	s_init.post();
 	s_qt_mutex.wait();