Tuning tpv rules for __DATA_FETCH__ tool

[cat-bro]

(1) data fetch was initially given 3.8GB of RAM per job. More 95% of these jobs will not run out of memory with 3.8G. There is a small subset of jobs that have run out even with 8G, so this has been raised to 10G. It would be good to find the job types that consistently use >4GB (saved in job metric data) so that these jobs can be given mem: 4 and only the others have 10G - it will make it easier to schedule

(2) Give data fetch jobs a higher slurm priority than other jobs.