Add workarounds for ffmpeg/kf5/oneVPL mess
    
    So...there's an ffmpeg update:
    https://bodhi.fedoraproject.org/updates/FEDORA-2023-a5e10b188a
    which went stable. It includes new sonames of all the ffmpeg
    libs. It also pulls in a thing called oneVPL, which has a bug
    that breaks ostree composes.
    
    There's a big kf5 update:
    https://bodhi.fedoraproject.org/updates/FEDORA-2023-b086a98f78
    which contains kf5-kfilemetadata, which is built against ffmpeg.
    Neal made sure that update's build of it was built against the
    new ffmpeg and submitted both for stable at once - but the tests
    on the kf5 update failed because they weren't run against the
    new ffmpeg as it wasn't yet stable, and the kf5 update was
    ejected from the push because of the failed tests.
    
    So now we have the ffmpeg update stable but not the
    kf5-kfilemetadata rebuild for it, which will break KDE stuff,
    and the oneVPL issue means ostree composes will all fail.
    
    This adds the ffmpeg update as a workaround so we can re-run the
    tests for the kf5 update and get them to pass so we can push it
    stable. It also adds the oneVPL update as a workaround so ostree
    compose tests don't start failing.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>