A new driver/coupler for GEOS-ESM

[zhaobin74]

PR checklist

• [X] Short (1 sentence) summary of your PR: This PR provides a new driver/coupler to NASA GMAO's GEOS-ESM.
• [X] Developer(s): @zhaobin74
• [X] Suggest PR reviewers from list in the column to the right. @eclare108213, @apcraig, @dabail10
• [X] Please copy the PR test results link or provide a summary of testing completed below. Full base_suite with both base tag (main) and this PR and got bit-for-bit identical results
• How much do the PR code changes differ from the unmodified code?
  • [X] bit for bit
  • [ ] different at roundoff level
  • [ ] more substantial
• Does this PR create or have dependencies on Icepack or any other models?
  • [ ] Yes
  • [X] No
• Does this PR update the Icepack submodule? If so, the Icepack submodule must point to a hash on Icepack's main branch.
  • [X] Yes
  • [ ] No
• Does this PR add any new test cases?
  • [ ] Yes
  • [X] No
• Is the documentation being updated? ("Documentation" includes information on the wiki or in the .rst files from doc/source/, which are used to create the online technical docs at https://readthedocs.org/projects/cice-consortium-cice/. A test build of the technical docs will be performed as part of the PR testing.)
  • [ ] Yes
  • [X] No, does the documentation need to be updated at a later time?
    • [X] Yes
    • [ ] No
• [X] Please document the changes in detail, including why the changes are made. This will become part of the PR commit log.
  • Adds a new driver for GEOS-ESM under drivers/mapl/geos
  • Adds a separate land sea mask to run thermodynamics ONLY
  • When proper, use GEOSCOUPLED macro to isolate the relevant code specific to GEOS
  • Depends on https://github.com/CICE-Consortium/Icepack/pull/491

Hi Consortium, this PR is two years of efforts to bring in CICE6/Icepack to GEOS-ESM coupled model. We have been successfully using it in our coupled GEOS-MOM6-CICE6 experiments. I appreciate your review and feedbacks and am happy to improve it along the way. Thank you.