consolidate psf and flat jobs

[sbailey]

One of the challenges of running kibo was the sheer number of jobs, ~50k. This required extra queue management to avoid submit limits, made rare startup problems common to encounter, and added overhead to reservations which sometimes had ~10% of the nodes idle while turning over jobs. To reduce the number of jobs,

• bundle arc and psfnight jobs together for a 6 -> 1 reduction for those steps. Consider also bundling the ccdcalib job into this bunch.
• bundle flat and nightlyflat jobs together for a 13 -> 1 reduction of those steps

Although there are still more science jobs than there are arc/psf/flat/nightlyflat jobs, these calib jobs are tightly coupled and blocking factors for getting to the more genuinely independent tilenight and ztile jobs, so bundling them would streamline the workflow.