kernel/synflood: require at least 64 cores and 2 NUMA nodes
    
    Based on several runs in Beaker, these seem to be the best conditions
    for distinguishing the bug. Currently, legacy Beaker HW filters are used
    in the metadata. Once TMT introduces support for generic HW
    requirements, they will need to be converted to the new format.
    
    Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>