Update for the FSD changes in icepack.

[dabail10]

…ew FSD rearrangement.

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please refer to: https://github.com/CICE-Consortium/About-Us/wiki/Resource-Index#information-for-developers

PR checklist

• Short (1 sentence) summary of your PR:
  This changes the calls to icepack_step_therm1 and icepack_step_therm2 for the FSD icepack updates.
• Developer(s):
  dabail10 (D. Bailey)
• Suggest PR reviewers from list in the column to the right.
• Please copy the PR test results link or provide a summary of testing completed below.
  Working on a QC test.
• How much do the PR code changes differ from the unmodified code?
  • bit for bit
  • different at roundoff level
  • more substantial
• Does this PR create or have dependencies on Icepack or any other models?
  • Yes
  • No
• Does this PR update the Icepack submodule? If so, the Icepack submodule must point to a hash on Icepack's main branch.
  • [ ] Yes
  • No
• Does this PR add any new test cases?
  • Yes
  • 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
  • No, does the documentation need to be updated at a later time?
    • Yes
    • No
• Please document the changes in detail, including why the changes are made. This will become part of the PR commit log.

[dabail10]

These look bfb, but when I compare the run logs they are different. So, this passes the QC test.

[eclare108213]

The changes to the interface will cause backward compatibility problems. However there will be similar changes from elsewhere in the next release, and it's better to do them all at once.

Do you intend to update Icepack in this PR? Based on the title, I think that's correct. Please reference the corresponding Icepack PR here and describe the changes being brought in. Thanks!