greenwave: gate updates on container build and aarch64 tests
    
    We added tests of container building and a subset of container
    and server tests on aarch64 a couple of months back. These have
    now been running long enough it should be safe to add them to
    the gating config (all pending updates should have had these
    tests run against them if appropriate).
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>