Increase all slurm timeouts to 30 minutes

[alexboden]

Some smaller jobs take longer than 15 minutes.

Example for deploy_website_preview:

/opt/slurm/bin/sacct --format="user%7,JobID,part,state%20,elapsed,JobName%16,acc%20,reqtre%70,node,exitcode" --allusers --starttime=$(date -d "-1 day" "+%Y-%m-%d") | grep 27939
watclo+ 27939           compute              TIMEOUT   00:15:15 slurm-slurm-run+  watonomous-watcloud                        billing=1,cpu=1,gres/tmpdisk=4096,mem=2G,node=1       tr-slurm1      0:0
        27939.batch                        CANCELLED   00:15:16            batch  watonomous-watcloud                                                                              tr-slurm1     0:15
        27939.extern                       COMPLETED   00:15:16           extern  watonomous-watcloud                                                                              tr-slurm1      0:0