Investigate how to get nvhpc on gh actions gpu runner with pixi

[joshkamm]

• Check if pixi has recursive source dependencies yet -> not yet but I think I may be able to use a pixi build workspace for managing nvhpc + libcint + SlaterGPU
• Look up how Nate used wget to grab nvhpc
• Create pixi-nvhpc-recipe repo in ZimmermanGroup
• Clone repo
• Pixi init
• Start building a pixi build recipe
• Use recipe source url to download and extract the nvhpc tarball
• Run nvhpc installation in pixi build recipe script
• Troubleshoot building the conda package with pixi install
• Try building inside github action
• Edit build script if necessary so things are in the places that conda environments expect
• Write a pixi test task that tries which nvc++ to validate that the installation worked
• Use great lakes if athena is slow

If I get stuck I could also reach out on the nvidia forum about whether they're interested in supplying nvhpc as a conda package on the nvidia channel