Instead of registering the whole list of formats associated to a chroma, our
experience with GstVA tells that entry points only handles one color format per
supported chroma, and they are reflected in the static table.
This avoids exposing unsupported color formats for negotiation.
Fixes: #3914
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7708>