Add STAGE_IC_YAML_TMPL variable

- Set it in configs so users can change the path to their own yaml
- Update python to use variable from configs

Refs NOAA-EMC#2475

parm/config/gefs/config.stage_ic

@@ -7,6 +7,8 @@ echo "BEGIN: config.stage_ic"
 # Get task specific resources
 source "${EXPDIR}/config.resources" stage_ic
 
+export STAGE_IC_YAML_TMPL="${PARMgfs}/stage/stage.yaml.j2"
+
 # Set ICSDIR
 
 if [[ -z "${ICSDIR}" ]] ; then

parm/config/gfs/config.stage_ic

@@ -7,6 +7,8 @@ echo "BEGIN: config.stage_ic"
 # Get task specific resources
 source "${EXPDIR}/config.resources" stage_ic
 
+export STAGE_IC_YAML_TMPL="${PARMgfs}/stage/stage.yaml.j2"
+
 # Set ICSDIR
 
 if [[ -z "${ICSDIR}" ]] ; then

scripts/exglobal_stage_ic.py

@@ -19,11 +19,10 @@ def main():
 
     # Pull out all the configuration keys needed to run stage job
     keys = ['RUN', 'MODE', 'CASE', 'CASE_ENS', 'OCNRES', 'ICERES', 'waveGRD',
-            'EXP_WARM_START', 'current_cycle', 'RDATE',
-            'ROTDIR', 'PARMgfs', 'ICSDIR', 'CDUMP', 'rCDUMP',
+            'EXP_WARM_START', 'current_cycle', 'RDATE', 'CDUMP', 'rCDUMP',
+            'ROTDIR', 'PARMgfs', 'ICSDIR', 'STAGE_IC_YAML_TMPL',
             'ntiles', 'MEMDIR', 'REPLAY_ICS',
-            'DO_WAVE', 'DO_OCN', 'DO_ICE', 'DO_NEST',
-            'CPL_ATMIC', 'CPL_ICEIC', 'CPL_OCNIC', 'CPL_WAVIC']
+            'DO_WAVE', 'DO_OCN', 'DO_ICE', 'DO_NEST']
 
     stage_dict = AttrDict()
     for key in keys:

ush/python/pygfs/task/stage.py

@@ -44,9 +44,7 @@ def execute_stage(self, stage_dict: Dict[str, Any]) -> None:
         if not os.path.isdir(stage_dict.ROTDIR):
             raise FileNotFoundError(f"FATAL ERROR: The ROTDIR ({stage_dict.ROTDIR}) does not exist!")
 
-        stage_parm = os.path.join(stage_dict.PARMgfs, "stage")
-
-        stage_set = parse_j2yaml(os.path.join(stage_parm, "stage.yaml.j2"), stage_dict)
+        stage_set = parse_j2yaml(self.task_config.STAGE_IC_YAML_TMPL, stage_dict)
 
         # Copy files to ROTDIR
         for key in stage_set.keys():