DM-32059 moves the tasks that were causing failures in obs_subaru to separate pipelines in `faro` so they won't affect obs_subaru.

FYI, if you want to get the list of tasks from a hierarchical pipeline, you can do something like:

pipetask build -p $FARO_DIR/pipelines/metrics_pipeline_jointcal_fgcm.yaml --show pipeline | awk '{if((length($0) > 2) && (substr($0, 3, 1) != " ")) print $0}'

(The awk bit is ugly and depends on the yaml formatting so you could handle that better if needed).

Sorry, Arun - I forgot to mention that there are two PRs for this ticket. The ci_hsc_gen3 PR is just to exclude faro from being run during that CI job.

Looks good. Left a comment about a minor reorganization at a later point.

Did a little reorganization of the subsets. I was going to simply call "faro_step2" in "step2" of the pipeline, but Nate pointed out that subsets of subsets don't work. Nonetheless, at least now there are faro_step2, faro_step3, and faro_step5 subsets.

Jenkins is green: https://ci.lsst.codes/blue/organizations/jenkins/stack-os-matrix/detail/stack-os-matrix/35188/pipeline