How many GPUs used counter

[stephenlienharrell]

We need a counter on the new version that says how many GPUs were used for a job.

[stephenlienharrell]

need to separate gpu counter data in order to implement this correctly

[nicejunjie]

preliminary implementation done and online for LS6.
limitations: 1) raw data for individual GPUs are merged in the database when imported, so only the total percentage is availlable.
2) a few nodes in gpu-a100-small and gpu-dev seems don't have gpu recording enabled by the monitor, no gpu data is recorded, e.g. : https://ls6-stats.tacc.utexas.edu/machine/job/1473810/

Possible workaround without changing database stucture: make "event" to be "utilization_$gpunumber" instead of "utilization" when importing, then extract "$gpunumber" in views.py.