Use the marine DA POST j-job to copy what we keep from the cycle in COMROT

[guillaumevernieres]

Description

Stop linking Data to the COMROT, instead use JGDAS_GLOBAL_OCEAN_ANALYSIS_POST to copy what we need to keep to the COMROT

See @aerorahul 's comments:

          This directory is being gutted here:

global-workflow/jobs/JGDAS_GLOBAL_OCEAN_ANALYSIS_POST

Line 21 in f98433f

[[ "${KEEPDATA}" = "NO" ]] && rm -rf "${DATA}"

I suggest the post job to copy what it needs to COM and create a working directory for this job in $DATAROOT

Originally posted by @aerorahul in #1270 (comment)