Since it's possible to grab the VA display from the GstBuffer and GstMemory, there's no need to keep a reference to it in GstVaDecodePicture. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3066>
And replacing all va lib headers with this new header files when including. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1256>