Gas-Gas Coupling and Sparse

[adamdempsey90]

Background

This adds Chapman-Cowling style collisional coupling between gas species. For this to work I've gone and done the following:

• The gas materials are now have their own EOS and opacities (those are vectors now).
• Tested out using sparse. That should work now
• Added a kokkos-kernels to the submodules. This is used in the coupling solve which has to invert a matrix.
• Added a new unit test for the collision integrals
• Expanded drag to include this collisional momentum and energy coupling.

I think this is ready for review now.

Description of Changes

Checklist

• New features are documented
• Tests added for bug fixes and new features
• (@lanl.gov employees) Update copyright on changed files
• Any contribution that was created or modified with the assistance of generative AI must have a comment disclosing this such as // This file was created in part or in whole by generative AI