Remove obs processing for JEDI ATM and JEDI Aero DA

[CoryMartin-NOAA]

Description

This PR removes the jobs that generate IODA observations for ATM and Aerosol DA using JEDI. Rather than converting to IODA in the workflow, the jobs will grab observations assuming the ObsForge directory structure and naming conventions. For operations, they will point COMIN_OBS to COM_OBSFORGE, for R&D, the prep.sh script has been modified to copy observations from IODADIR to COM.

G-W core devs: I suggest we create a new "dump" directory that gets sync'd across platforms for the CI tests to start, with the intention of eventually being the "IODA GDA". This PR is in draft until that directory gets staged and I can update the paths for each machine. I have an example directory on Ursa that I was using for dev/CI testing at: /scratch3/NCEPDEV/stmp/Cory.R.Martin/nov2025/obsforge-gw/obsforge_dump

Resolves #4064

Type of change

• Bug fix (fixes something broken)
• New feature (adds functionality)
• Maintenance (code refactor, clean-up, new CI test, etc.)

Change characteristics

• Is this a breaking change (a change in existing functionality)? YES
• Does this change require a documentation update? NO
• Does this change require an update to any of the following submodules? YES
  • EMC verif-global
  • GDAS Use ObsForge conventions for aerosols + assume COMIN_OBS gets populated from ObsForge GDASApp#1970
  • GFS-utils
  • GSI
  • GSI-monitor
  • GSI-utils
  • UFS-utils
  • UFS-weather-model
  • wxflow

How has this been tested?

Ursa - tested with the C96 gcafs test and the C96C48 UFS ATM DA test

Checklist

• Any dependent changes have been merged and published
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have documented my code, including function, input, and output descriptions
• My changes generate no new warnings
• New and existing tests pass with my changes
• This change is covered by an existing CI test or a new one has been added
• Any new scripts have been added to the .github/CODEOWNERS file with owners
• I have made corresponding changes to the system documentation if necessary

[CoryMartin-NOAA]

Pinging @DavidHuber-NOAA @aerorahul and @nicholasesposito what I put above (in case the draft PRs don't send anything)

G-W core devs: I suggest we create a new "dump" directory that gets sync'd across platforms for the CI tests to start, with the intention of eventually being the "IODA GDA". That way it is separate from the existing operational GDA. This PR is in draft until that directory gets staged and I can update the paths for each machine. I have an example directory on Ursa that I was using for dev/CI testing at: /scratch3/NCEPDEV/stmp/Cory.R.Martin/nov2025/obsforge-gw/obsforge_dump