Redo sample packages.yaml for upcoming 2021.02 release. Move cuda, rocm, mpi to their own secion. Update versions and variants for various packages.
Redo sample packages.yaml for upcoming 2021.02 release.
Move cuda, rocm, mpi to their own secion.
Update versions and variants for various packages.

HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit