[Vulkan] [Windows] Add Flip Model Fullscreen

[Awakened0]

This was added to d3d11 awhile back (7d31364) and apparently d3d12 only presents fullscreen in this mode.

I wasn't sure if this fullscreen mode was possible to use with vulkan, but I saw this post recently, which suggests it is.

Vulkan currently blocks the Windows volume overlay from displaying in both exclusive and borderless fullscreen modes. d3d11's flip mode fullscreen doesn't, while maintaining seamless alt tabbing and full screen Gsync support.