Move GEOS envs in UE to ESMF 9.0.0b11

[mathomp4]

Description

GEOS and MAPL are fine with ESMF 9.0.0b11 so we might as well move geos-gcm-env and jedi-geos-env to use it in unified-env. Plus this removes one ESMF from the matrix which should help build times. (Would be nice to remove the other old ones as well...)

Also, a tiny update to the macos.gmao readme.

Dependencies

None

Issues addressed

None

Applications affected

GEOS, maybe JEDI?

Before the jedi-geos-env was using ESMF 8.9.0. Since it has "geos" in the name, I figure it's roughly GEOS shaped and so would do fine with ESMF 9.0.0b11 (since I imagine MAPL is the reason for ESMF).

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 (spack-stack wiki) will be made when this PR is merged