Extend abstract interfaces for bulk aerosol optics

[fvitt]

Issue Type

Infrastructure Update

Issue Description

Extend the abstract aerosol interfaces for bulk aerosol representations for optical properties of aerosols, including volcanic / stratospheric aerosols.

Expect round-off level differences in optical properties for configurations that BAM and volcanic aerosols.

Will this change answers?

Yes

Will you be implementing this yourself?

Yes