[develop] Add IMS snow cover obs

[EdwardSnyder-NOAA]

Description

This PR adds the IMS snow cover obs as an optional obs input. To use the IMS snow cover obs, a new subcomponent was added. This subcomponent built successfully on Hera (/scratch1/NCEPDEV/stmp4/Edward.Snyder/IMS_snowcover_obs/git-repo/land-DA_workflow), and from what I can tell, runs successfully.

There are a number of changes that still need to be made in the prep_obs script, which are denoted by the TODO tags. The main problem is that I cannot find observations to test these code changes. See below for a breakdown of this issue:

Running the standard LND cold start case

• IMS data doesn't exist in the netcdf format the script expects
• possible solution is to convert the asc files to netcdf - haven't figured it out yet
• a solution that sort of worked was to convert the IMS obs to the date of this case (see first bullet) and place restart files for this case that matches what the prep_obs file is looking for (see second bullet). The experiment (see third bullet) ran but returns an empty forecast file, and I don't think the analysis task ran properly.
  • /scratch1/NCEPDEV/stmp4/Edward.Snyder/IMS_snowcover_obs/git-repo/ims_case_data/ims2023121_4km_v1.3.nc
  • /scratch1/NCEPDEV/stmp4/Edward.Snyder/IMS_snowcover_obs/land-DA_update/jedi/restarts/20000104.000000.sfc_data.tile1.nc
  • /scratch1/NCEPDEV/stmp4/Edward.Snyder/IMS_snowcover_obs/git-repo/exp_case/00_96_lnd_coldstart

Running the standard LND cold start case with a newer date

• if we update the date to a newer date that has IMS snow obs in netcdf format we run into the following problems:
  • need the climate forcing files to run the fcst expt with the newer date (i.e. clmforc.GSWP3*)
  • need the restart files to run the fcst expt with the newer date (i.e. ufs_land_restart*) - don't think this is needed
  • sfc files as mentioned in the previous section's second bullet are still needed

Once the obs issue is resolved and the Land DA system incorporates the IMS obs properly, then the plot_stats script will need to be updated to handle IMS snow cover obs.

Anticipated changes to regression tests:

• Is baseline change expected ?

Subcomponents involved:

• apply_incr.fd (NOAA-PSL/land-apply_jedi_incr)
• ufs_model.fd (ufs-community/ufs-weather-model)
• UFS_UTILS.fd (ufs-community/UFS_UTILS)
• none

Linked PR's and Issues:

Testing (for CM's):

• RDHPCS
  • Hera
  • Orion
  • Hercules
• CI
  • Completed
• WE2E
  • Completed
• PW-Clouds
  • AWS
  • AZURE
  • GCP