ucx: add additional variants (#15925)
ucx: add additional variants (#15925)

* Add more variants to ucx

* Fix flake8 issue
iulian787/spack,LLNL/spack,LLNL/spack,iulian787/spack,iulian787/spack,LLNL/spack,iulian787/spack,LLNL/spack,iulian787/spack,LLNL/spack