Add the single-shot FGCM PipelineTask(s) from
DM-29348 to the obs_subaru DRP.yaml and multiVisit subset.
Add other PipelineTasks from that pipeline to the singleFrame and multiVisit subsets as needed to maximize how much of the full pipeline those subsets cover. Exception: keep diffimDRP separate until we've had more time to test and tune it.
DM-29596 branches, move as possible of the the common subset definitions to pipe_tasks and override as necessary in obs_subaru and obs_lsst.