Refactor aerosol_optics_cam to extract core computations for sharing with CAM-SIMA

[jimmielin]

Issue Type

Infrastructure Update

Issue Description

aerosol_optics_cam.F90 contains monolithic SW/LW aerosol optics routines that mix portable computation with CAM-specific diagnostics, aerosol abstract interface calls, and state access.

The goal is to extract the portable optics core into aerosol_optics_core.F90 so it can be shared with CAM-SIMA, leaving the CAM-specific diags code etc. in place.

This will be a bit-for-bit change.

Will this change answers?

No

Will you be implementing this yourself?

Yes