Allow bonus faint guide stars for dyn bgd enabled

[taldcroft]

Description

Per discussion at SS&AWG on 2022-Apr-27 (see the presentation there for full details), this adds two new parameters to the base ACACatalogTable and the get_aca_catalog function to allow specifying the parameters of the bonus stars.

Requires:

• https://github.com/sot/sparkles/pull/172
• https://github.com/sot/chandra_aca/pull/124

Interface impacts

Adds dyn_bgd_n_faint and dyn_bgd_dt_ccd arguments to get_aca_catalog. The default settings (in particular dyn_bgd_n_faint = 0) have behavior that is identical to current flight star selection.

Testing

Unit tests using above-mentioned branches

• [x] Mac

Independent check of unit tests by Javier

• [x] Mac

Functional tests

• https://nbviewer.org/urls/cxc.cfa.harvard.edu/mta/ASPECT/proseco/test-dyn-bgd-bonus-stars.ipynb
• https://nbviewer.org/urls/cxc.cfa.harvard.edu/mta/ASPECT/proseco/test-dyn-bgd-bonus-stars-obs23700.ipynb

[taldcroft]

@jeanconn - ready for final review

[taldcroft]

@javierggt - can you Approve the PR?

[javierggt]

yes, I was going over the output of the notebook that was running. My plots look slightly different, but I am guessing that's because I have not updated ska data in a while.