Add scotch library as a replacement for parmetis

[climbfuji]

Please describe the package or library you would like to add to spack-stack.
parmetis is the parallelized version of the graph partitioning library metis and used by several codes that work with unstructured meshes (e.g. MPAS). Unfortunately, parmetis was rejected from the WCOSS2 software list and a replacement for it, called scotch (sounds much better to me anyway), was found. This needs to be added to spack-stack.

I believe it's this website: https://www.labri.fr/perso/pelegrin/scotch

Which version? @ulmononian @junwang-noaa

What applications will be using this package or library?
Codes using unstructured meshes in operations.

Is there already a package or library in spack-stack that provides this, or related, functionality?
parmetis, which isn't allowed on WCOSS2

Additional context
n/a

Will This Package be Needed in a NOAA Operational Application?
Yes. I will skip the WCOSS System Software Request Checklist, because scotch has already been approved for installation on WCOSS2 by some effort in the UFS community.

[ulmononian]

@climbfuji i can handle this if it is needed.

[climbfuji]

THe scotch library is already in spack https://github.com/spack/spack/blob/develop/var/spack/repos/builtin/packages/scotch/package.py - we need to (a) check if the code for this package in our fork is up to date (we pulled in spack develop about two weeks ago), and (b) add it to our spack configuration files. I suggest to add it to the ufs environments/templates for now, not base-env or jedi-base-env.

[ulmononian]

@climbfuji not sure if it meets the check you are describing, but i installed scotch@7.0.1 (the latest version) via EMC spack-stack just a few days ago here: /scratch1/NCEPDEV/stmp2/Cameron.Book/spack_work/spack-stack/envs/scotch.intel, so i assume it is up to date in the fork.

as for the templates, i suppose it should go in hpc-stack-dev and ufs-weather-model. i am not sure what the base-env or jedi-base-envs are...

[ulmononian]

@climbfuji circling back to this. if there are specifics for a PR to this repo that are needed, please let me know. it would be nice to jointly address this issue and be able to get NOAA-EMC/hpc-stack#504 merged.

[climbfuji]

@climbfuji circling back to this. if there are specifics for a PR to this repo that are needed, please let me know. it would be nice to jointly address this issue and be able to get NOAA-EMC/hpc-stack#504 merged.

sorry I missed your previous comment. it's fine to add it to hpc-stack-dev and ufs-weather-model, you may want to add it to spack/var/spack/repos/jcsda_emc_bundles/packages/ufs-weather-model-env/package.py as well?