Update met and metplus versions

[RatkoVasic-NOAA]

Description

Updated met from 11.1.0 to 12.0.1 and metplus from 5.1.0 to 6.0.0

Dependencies

Issues addressed

closes #1739

Applications affected

SRW is already using new versions.

Systems affected

All.

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 on readthedocs are included in this PR
  • For site config updates, check in particular doc/source/PreConfiguredSites.rst and doc/source/MaintainersSection.rst
• All necessary updates to the spack-stack wiki will be made when this PR is merged

[RatkoVasic-NOAA]

Once 1.9.3 is ready, these changes should be added to https://github.com/JCSDA/spack-stack/wiki/Package-versions

[climbfuji]

Approved