Update test compose data and adjust schedule tests
    
    The test 'real' compose data we use in some of the scheduling
    tests is *very* old and not much like current composes - it has
    32-bit ARM images in it, it *doesn't* have 64-bit ARM images in
    it, and it doesn't have Silverblue. So let's rip it and replace
    it with data from today's Rawhide compose. This requires a lot
    of tweaks to the tests themselves, too, as the set of tests we
    schedule from this data is quite different from the set of tests
    we schedule from the old data.
    
    Also a few minor layout tweaks to avoid overlong lines.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>