Allow scheduling of more than 10k jobs on CC

[dantp-ai]

One approach is to have an extra parameter offset for the original index:

my index = (OFFSET-1)*10000 + job array index

[yiwan-rl]

Agree, the offset should be passed into sbatch script by submitter through --export. And the user can then use

my index = (OFFSET-1)*10000 + job array index

in the sbatch script.