[Feature Request]: general --slurm-flags flag for the Chapel launcher to pass on to slurm

[lydia-duncan]

Summary of Feature

Description:
(Filing on behalf of Oliver via Discord, see this thread)

Oliver ran into an issue where some slurm settings were not getting respected by our launcher. In particular, he had to explicitly pass in the flags --time, --account, and --qos. It would be handy to have a --slurm-flags flag or something similar that could be used to specify all of those settings in the Chapel compilation or execution command and have them get passed on to the command the Chapel launcher calls on the user's behalf.

Is this issue currently blocking your progress?
No, it sounded like Oliver had a manual workaround that accomplished what he needed. Still, it'd be nice to support this more cleanly

Code Sample

[bradcray]

We could also consider calling this --launcher-flags (or supporting both) in order to (eventually) support a similar capability for our other pbs or gasnet-based launchers.