Plot postprocessed ice concentration increment (#1446)

# Description

Add plots to offline vrfy to output postprocessed (aka what get added to
CICE restart) sea ice increment.

# Companion PRs

NOAA-EMC/jcb-gdas#64
NOAA-EMC/global-workflow#3235

# Issues

Resolves #1402 

# Automated CI tests to run in Global Workflow

Since it's offline vrfy, no tests would cover it currently.

<!-- Which Global Workflow CI tests are required to adequately test this
PR? -->
- [ ] atm_jjob <!-- JEDI atm single cycle DA !-->
- [ ] C96C48_ufs_hybatmDA <!-- JEDI atm cycled DA !-->
- [ ] C96C48_hybatmaerosnowDA  <!-- JEDI aero/snow cycled DA !-->
- [ ] C48mx500_3DVarAOWCDA <!-- JEDI low-res marine 3DVar cycled DA !-->
- [ ] C48mx500_hybAOWCDA <!-- JEDI marine hybrid envar cycled DA !-->
- [ ] C96C48_hybatmDA <!-- GSI atm cycled DA !-->

---------

Co-authored-by: Anna Shlyaeva <[email protected]>

utils/soca/fig_gallery/exgdas_global_marine_analysis_vrfy_manual.py

@@ -146,7 +146,16 @@
                                                'hs_h': [-0.1, 0.1]},
                               colormap='seismic',
                               projs=['North', 'South'],
-                              comout=os.path.join(comout, 'vrfy', 'incr'))]   # sea ice increment
+                              comout=os.path.join(comout, 'vrfy', 'incr')),   # sea ice increment
+                   plotConfig(grid_file=grid_file,
+                              data_file=os.path.join(comout, f'{RUN}.t'+cyc+'z.ice.incr.postproc.nc'),
+                              lats=np.arange(-60, 60, 10),
+                              variables_horiz={'aice_h': [-0.2, 0.2],
+                                               'hi_h': [-0.5, 0.5],
+                                               'hs_h': [-0.1, 0.1]},
+                              colormap='seismic',
+                              projs=['North', 'South'],
+                              comout=os.path.join(comout, 'vrfy', 'incr.postproc'))]   # sea ice increment after postprocessing
     configs.extend(config_incr)