Add VarBC for aerosol DA

[ypwang19]

Description

This PR adds in VarBC configuration for aerosol DA. This PR copy the input bias files to {DATA}/bc and copy back the output bias files to analysis/chem.

Type of change

• New feature (adds functionality)

Change characteristics

• Is this a breaking change (a change in existing functionality)? NO
• Does this change require a documentation update? NO
• Does this change require an update to any of the following submodules? NO

How has this been tested?

• Cycled test on Hera

Checklist

• Any dependent changes have been merged and published
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• New and existing tests pass with my changes
• I have made corresponding changes to the documentation if necessary

[CoryMartin-NOAA]

I'm wondering if we wait to merge this in once NOAA-EMC#2862 is done so it is done consistently across different systems. Thoughts?

[andytangborn]

I'm wondering if we wait to merge this in once NOAA-EMC#2862 is done so it is done consistently across different systems. Thoughts?

Is this issue going to result in a PR being merged into feature/aero-b ? I would assume that it is best to merge this in before feature/aero-b gets merged into develop.

[CoryMartin-NOAA]

Problem is, I think feature/aero-b is 'ready' to merge, and if this gets added, we will have to go through the testing process again, so I would prefer to do that when we are sure the coefficients are being handled consistently

[ypwang19]

I agree that we could wait for this work is done. I was not quite sure how to deal with the original code related to statbias files.

I'm wondering if we wait to merge this in once NOAA-EMC#2862 is done so it is done consistently across different systems. Thoughts?