This PR updates several configures to prepare observations for snow DA updates to the ensemble members. Because the snow observations are fetched from the COM_OBS in the gdas deterministic analysis and are saved into the COM_OBS in the enkfgdas analysis for the enkfgdas run, we have to define two different COM_OBS directories (COMIN_OBS vs COMOUT_OBS) and two obs basename heads (OPREFIX_IN vs OPREFIX_OUT) to identify the enkf analysis from the gdas deterministic analysis.
This PR updates several configures to prepare observations for snow DA updates to the ensemble members. Because the snow observations are fetched from the COM_OBS in the gdas deterministic analysis and are saved into the COM_OBS in the enkfgdas analysis for the enkfgdas run, we have to define two different COM_OBS directories (COMIN_OBS vs COMOUT_OBS) and two obs basename heads (OPREFIX_IN vs OPREFIX_OUT) to identify the enkf analysis from the gdas deterministic analysis.
This PR will contribute to https://github.com/NOAA-EMC/global-workflow/pull/2416.