Make sure that the available software script finds aarch64/nvidia/* CPU targets

[bedroge]

$ find ${EESSI_TOPDIR}/software/linux/*/{amd,intel,nvidia}/* -maxdepth 0  -type d
/cvmfs/software.eessi.io/versions/2023.06/software/linux/x86_64/amd/zen2
/cvmfs/software.eessi.io/versions/2023.06/software/linux/x86_64/amd/zen3
/cvmfs/software.eessi.io/versions/2023.06/software/linux/x86_64/amd/zen4
/cvmfs/software.eessi.io/versions/2023.06/software/linux/x86_64/intel/cascadelake
/cvmfs/software.eessi.io/versions/2023.06/software/linux/x86_64/intel/haswell
/cvmfs/software.eessi.io/versions/2023.06/software/linux/x86_64/intel/icelake
/cvmfs/software.eessi.io/versions/2023.06/software/linux/x86_64/intel/sapphirerapids
/cvmfs/software.eessi.io/versions/2023.06/software/linux/x86_64/intel/skylake_avx512
/cvmfs/software.eessi.io/versions/2023.06/software/linux/aarch64/nvidia/grace

[Neves-P]

lgtm