Updating Regression Tests and Examples

[jpmorgan98]

The MPI issues keep failing out after repos are forked and we need to do better about testing all functionality. The specific tests we need to add:

• Parallel regression test
• Numba regression test
• MPI & Numba Regression tests
• Updating examples to have current functionality
  I think as a stop gap measure we can write a number of SLURM or LSF batch scripts for Lassen or Quartz to at least somewhat optimize the process tho let me know what yall think.

[ilhamv]

Effort to address this: #131

[jpmorgan98]

I think we should retool the tests to not be so long. I will tackle this!

[ilhamv]

Also, note that now we do mpi test with mpiexec=2 and mpiexec=4. We can just do one of them.

[jpmorgan98]

Ya I think a github action only gives us 2 CPU cores anyways.

[spasmann]

Dang. 4 would be ideal for DD tests.

[jpmorgan98]

We can still launch 4 threads in that case they just wont be at all performant