[release/2.1] Update netcdf-c from spack develop to fix missing plugins

[climbfuji]

Description

Update submodule pointer for repos/builtin for the changes in JCSDA/spack-packages#58.

Dependencies

• Waiting on [release/2.1] Update netcdf-c from spack develop to fix missing plugins spack-packages#58

Issues addressed

Closes #1997

Applications affected

UFS

Systems affected

None directly

Testing

• CI: Note whether the automatic tests (GitHub actions tests that run automatically for every commit) pass or not
  • GitHub actions CI tests pass
  • GitHub actions CI tests do not pass (provide explanation)
  • GitHub actions CI tests skipped (provide explanation if necessary)
• New tests added: List and describe any new tests added to GitHub actions
  • ...
• Additional testing: Add information on any additional tests conducted
  • ...

Checklist

• This PR addresses one issue/problem/enhancement or has a very good reason for not doing so.
• These changes have been tested on the affected systems and applications.
• All dependency PRs/issues have been resolved and this PR can be merged.
• All necessary updates to the documentation (spack-stack wiki) will be made when this PR is merged

[climbfuji]

@rickgrubin-noaa Are you able to give this a try on one of the NOAA machines to check if it fixes the netcdf-c plugins issue?