Changes for ATS4

[rbberger]

PR Summary

• adds CI for ATS4
• updates patch for spark-variant to support ROCm

PR Checklist

• Adds a test for any bugs fixed. Adds tests for new features.
• Format your changes by using the make format command after configuring with cmake.
• Document any new features, update documentation for changes made.
• Make sure the copyright notice on any files you modified is up to date.
• After creating a pull request, note it in the CHANGELOG.md file.
• LANL employees: make sure tests pass both on the github CI and on the Darwin CI

If preparing for a new release, in addition please check the following:

• Update the version in cmake.
• Move the changes in the CHANGELOG.md file under a new header for the new release, and reset the categories.
• Ensure that any when='@main' dependencies are updated to the release version in the package.py

[Yurlungur]

Awesome to have this in. Please update Kokkos in the submodule and the spackage too if needed.

[Yurlungur]

Nice. This is a good addition.

[Yurlungur]

👍 for splitting this out

[rbberger]

I still want to update this next week to use the Cray Fortran compiler to enable building our Fortran interfaces. I already tested this, I just need to propagate this to the CI. We do also have an issue of very slow build times with -O1 or higher.