crc-usage: Incorporate running / pending job billing TRES in total usage value

[Comeani]

Currently, the crc usage output pulls directly from the slurm job accounting database which will only show a usage-per-user that includes jobs that are finished. This can create a situation where users will submit a job that exceeds the limit (their job + the running jobs of others even though it seems like there should be enough SUs for their job to run.