lmod: change variant defaults to match Lmod's defaults (#17770)
lmod: change variant defaults to match Lmod's defaults (#17770)


LLNL/spack,iulian787/spack,LLNL/spack,LLNL/spack,iulian787/spack,iulian787/spack,iulian787/spack,LLNL/spack,iulian787/spack,LLNL/spack