The transformation was fuzzy, adding random modifiers to the list. Use the newly
introduce helpers from 1.26 to precisely convert GStreamer formats to a DRM
fourcc and modifier pair and vice-versa.
This fixes support for formats that have a GstVideoFormat value and requires a
modifier.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9306>