Disable pres_b archiving of gcafs products

[aerorahul]

Description

This is a hotfix PR to disable non-existent pres_b product archiving from the GCAFS system.

Type of change

• Bug fix (fixes something broken)

Change characteristics

• Is this change expected to change outputs (e.g. value changes to existing outputs, new files stored in COM, files removed from COM, filename changes, additions/subtractions to archives)? NO
  • GFS
  • GEFS
  • SFS
  • GCAFS
• Is this a breaking change (a change in existing functionality)? NO
• Does this change require a documentation update? NO
• Does this change require an update to any of the following submodules? NO

How has this been tested?

Tested in one of #4328

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

[DavidHuber-NOAA]

Launching just the GCAFS tests on C6.

[DavidHuber-NOAA]

GCAFS tests passed on C6. Merging.