Update target selection mechanism based on blackspot distance

As discussed during the ICS/PFI telecon 2023-01-20 (https://sumire.pbworks.com/w/page/151793943/ICS-PFI-MCS%20telecon%20on%20Jan%2020%202023) as part of the target selection scheme, we need to penalize objects that are vignetted by black spots.

This is part of a long-term solution to recover approx 2% of the patrol region, that is obscured by the blackdot penumbra.

To do this, a penalty function that depends on the distance the target is from the blackspot will need to be provided elsewhere. I propose this goes through Project Office. This penalty function will be based on target priority observers assign, given the signal-to-noise at that target position.