Enable aarch64 + ppc64le arch for python3.*
    
    This enable a scratch-build for those new arches. The jobs are
    non-voting. The x86_64 job will still run as voting.
    
    The jobs for the new arches do not produce any artifacts.
    The childs jobs still use the x86_64 build to process.
    
    The master/f33/f32 are support by those new jobs.
    
    - rpm-scratch-build-aarch64
    - rpm-scratch-build-ppc64le
    
    New arches support could be added later.