Run one executable for soca2cice (instead of two) (NOAA-EMC#3118)

Run a single executable to add soca increments to cice restart files,
processing arctic and antarctic simultaneously to save on runtime and
I/O.
Resolves NOAA-EMC/GDASApp#1367

---------

Co-authored-by: shlyaeva <anna.v.shlyaeva@noaa.gov>
Co-authored-by: RussTreadon-NOAA <26926959+RussTreadon-NOAA@users.noreply.github.com>
Co-authored-by: RussTreadon-NOAA <Russ.Treadon@noaa.gov>

scripts/exglobal_marine_analysis_checkpoint.py

@@ -24,6 +24,5 @@
     # Prepare the SOCA increment for MOM6 IAU
     MarineAnl.checkpoint_mom6_iau('socaincr2mom6.yaml')
 
-    # Insert the seaice analysis into the CICE6 restarts in 2 sequential stages
-    MarineAnl.checkpoint_cice6('soca_2cice_arctic.yaml')
-    MarineAnl.checkpoint_cice6('soca_2cice_antarctic.yaml')
+    # Insert the seaice analysis into the CICE6 restart
+    MarineAnl.checkpoint_cice6('soca_2cice_global.yaml')

ush/python/pygfs/task/marine_analysis.py

@@ -284,7 +284,7 @@ def _prep_checkpoint(self: Task) -> None:
 
         # render the SOCA to CICE YAML file for the Arctic and Antarctic
         logger.info("render the SOCA to CICE YAML file for the Arctic and Antarctic")
-        varchgyamls = ['soca_2cice_arctic.yaml', 'soca_2cice_antarctic.yaml']
+        varchgyamls = ['soca_2cice_global.yaml']
         for varchgyaml in varchgyamls:
             soca2cice_config = parse_j2yaml(path=os.path.join(self.task_config.MARINE_JCB_GDAS_ALGO, f'{varchgyaml}.j2'),
                                             data=soca2cice_param)