Allow -n | --dryrun for submission rocoto commands

[aerorahul]

This PR:

• enables the user to provide an option -n | --dryrun to rocotorun, rocotoboot commands. When combined with -v 10, this option returns to stdout the jobcard that would have been submitted to the batch queuing system (BQS).
• ensures that the database is cleaned when -n is invoked, so that there is no record of the dryrun call
• ensures the logging is captured on the tasks that were invoked with -n.

Resolves #114

A few sample outputs are included here as examples:

 ❯❯❯ rocotorun -n -v 10 -d ttt.db -w ttt.xml
06/05/25 09:11:01 EDT :: ttt.xml :: Submitting gfs_stage_ic using sbatch < /tmp/sbatch.in20250605-543006-11ti70d with input
{{
#! /bin/sh
#SBATCH --job-name=ttt_gfs_stage_ic_12
#SBATCH --account=da-cpu
#SBATCH --qos=batch
#SBATCH --partition=service
#SBATCH -t 00:15:00
#SBATCH --nodes=1-1
#SBATCH --tasks-per-node=1
#SBATCH --cpus-per-task=1
#SBATCH --mem=4096
#SBATCH -o /xxx/ttt/logs/2021032312/gfs_stage_ic.log
#SBATCH --export=NONE
#SBATCH --comment=043efe193d6aa501d63c92ba7b192cf6
export RUN_ENVIR='emc'
export HOMEgfs='/xxx/global-workflow'
export EXPDIR='/xxx/ttt'
export NET='gfs'
export RUN='gfs'
export CDATE='2021032312'
export PDY='20210323'
export cyc='12'
export COMROOT='/xxx/COMROOT'
export DATAROOT='/xxx/ttt/gfs.2021032312'
/xxx/global-workflow/dev/jobs/stage_ic.sh
}}

A peek in logs/ after issuing the above call successively, reveals:

❯❯❯ cat logs/2021032312.log
2025-06-05 09:01:31 -0400 :: hfe09 :: Submitting gfs_stage_ic
2025-06-05 09:01:31 -0400 :: hfe09 :: Submission of gfs_stage_ic was a dryrun!
2025-06-05 09:02:06 -0400 :: hfe09 :: Submitting gfs_stage_ic
2025-06-05 09:02:06 -0400 :: hfe09 :: Submission of gfs_stage_ic was a dryrun!
2025-06-05 09:04:46 -0400 :: hfe09 :: Submitting gfs_stage_ic
2025-06-05 09:04:46 -0400 :: hfe09 :: Submission of gfs_stage_ic was a dryrun!
2025-06-05 09:07:14 -0400 :: hfe09 :: Submitting gfs_stage_ic
2025-06-05 09:07:14 -0400 :: hfe09 :: Submission of gfs_stage_ic was a dryrun!
2025-06-05 09:08:45 -0400 :: hfe09 :: Submitting gfs_stage_ic
2025-06-05 09:08:45 -0400 :: hfe09 :: Submission of gfs_stage_ic was a dryrun!
2025-06-05 09:11:01 -0400 :: hfe09 :: Submitting gfs_stage_ic
2025-06-05 09:11:01 -0400 :: hfe09 :: Submission of gfs_stage_ic was a dryrun!

[aerorahul]

@christopherwharrop-noaa
We have used this branch for a while on RDHPCS machines [Hera and GaeaC6] with Slurm and WCOSS with PBS, as we previously discussed.
I am happy to address any questions you have.
Thank you for considering this feature for inclusion in your future releases.