Add GFS Low-Resolution Test Case

[AntonMFernando-NOAA]

Description

• This PR adds a new test case, gfs.v17_lowres_extended, to validate all GFS functionality at low resolution.
• The test is modeled after C96C48mx500_S2SW_cyc_gfs with the following enhancements:

1. Runs at least through 2021122200

2. Forecast length is 384 hours

3. All downstream jobs (GOES, NPOESS, gempak, AWIPS, etc.) are executed

4. Archiving is enabled

5. The config.arch_tars ARCH_WARMICFREQ parameter is made configurable at setup time, allowing it to be set to 1 for restart set creation

Resolves #4434

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 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)? YES (If YES, please indicate to which system(s))
  • GFS
  • GEFS
  • SFS
  • GCAFS
• Is this a breaking change (a change in existing functionality)? YES
• Does this change require a documentation update? YES
• Does this change require an update to any of the following submodules? YES (If YES, please add a link to any PRs that are pending.)
  • EMC verif-global
  • GDAS
  • GFS-utils
  • GSI
  • GSI-monitor
  • GSI-utils
  • UFS-utils
  • UFS-weather-model
  • wxflow

How has this been tested?

• test on wcoss2

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