Create index file for master

[aerorahul]

Description

This PR:

• Resolves GFS master index files are missing #4505 by creating an index file for the master grib2 file

Type of change

• Bug fix (fixes something broken)
• 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
  • 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?

Will let the CI test, as the command used in this works on other grib2 files.

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

[WenMeng-NOAA]

The update looks good to me.

[DavidHuber-NOAA]

@TravisElless-NOAA would you mind merging this into #4523? We can then test both PRs in one automated CI suite.

[TravisElless-NOAA]

This change has been incorporated in #4523

[DavidHuber-NOAA]

Closing.