Add scotch

[ulmononian]

WW3 requires the scotch package for mesh/graph partitioning (see spack-stack #465, #336).

This adds a checksum for scotch/7.0.3 as well as two new variants (to turn off threading) to the scotch package.py. It also adds scotch to the ufs-weather-model-env package.py.

Installs successfully as standalone package and as a part of ufs-weather-model-env (intel & gcc) on Orion and Hera.

WW3 runs successfully with new variants on Hera.

main spack PR: spack#37054
spack-stack PR: JCSDA/spack-stack#550

[climbfuji]

This all looks good, but we need to get the CI tests up and running again in your companion spack-stack PR. I'll work on that today/tomorrow.

[climbfuji]

I'll mark this as "Request changes" because I am aware of segfaults on Hera that need to be figured out first. Otherwise, the PR looks good, installs cleanly in CI (macOS, Ubuntu), see https://github.com/NOAA-EMC/spack-stack/pull/550/files

[ulmononian]

I'll mark this as "Request changes" because I am aware of segfaults on Hera that need to be figured out first. Otherwise, the PR looks good, installs cleanly in CI (macOS, Ubuntu), see https://github.com/NOAA-EMC/spack-stack/pull/550/files

i believe the reported segfaults were using the hpc-stack version, so i need to try to build that slightly differently. i don't think anyone tested the spack-stack version of 7.0.3 within the context of ww3 yet, but hoping that goes more smoothly. will report back.

[climbfuji]

I'll mark this as "Request changes" because I am aware of segfaults on Hera that need to be figured out first. Otherwise, the PR looks good, installs cleanly in CI (macOS, Ubuntu), see https://github.com/NOAA-EMC/spack-stack/pull/550/files

i believe the reported segfaults were using the hpc-stack version, so i need to try to build that slightly differently. i don't think anyone tested the spack-stack version of 7.0.3 within the context of ww3 yet, but hoping that goes more smoothly. will report back.

Ok, please let me know when you had a chance to test it and I can approve/merge. Thanks!

[ulmononian]

I'll mark this as "Request changes" because I am aware of segfaults on Hera that need to be figured out first. Otherwise, the PR looks good, installs cleanly in CI (macOS, Ubuntu), see https://github.com/NOAA-EMC/spack-stack/pull/550/files

@climbfuji i just merged develop into this. now it is just the scotch updates for spack that need to precede JCSDA/spack-stack#550.