Remaining batched GMRES optimizations

[thomasgibson]

Description

Some remaining issues to clear up for the batched GMRES solver:

1. Mask-out converged columns;
2. Optimizing global memory access;
3. Remove unnecessary movement of data
   • Can look at the Columnwise LU solver for inspiration

Other related issues can be posted here.

For CLIMA Developers

• [ ] This feature can be added (if it cannot be, explain why in a comment below -- lack of technical expertise, not relevant to the scope of this project, too ambitious)
• [ ] There is a timeline for when this feature can be implemented
• [ ] The feature has been (or will be) implemented (Please link the PR)