Update KE diagnostic

[apcraig]

PR checklist

• Short (1 sentence) summary of your PR:
  Update KE diagnostic
• Developer(s):
  apcraig
• 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.
  Full test suite passes, all results bit-for-bit except KE, rms ice speed, and max speed on C-grid in log files. https://github.com/CICE-Consortium/Test-Results/wiki/cice_by_hash_forks#db254c11ba0a96b10f875a2d2003ec6aa9298073
• How much do the PR code changes differ from the unmodified code?
  • bit for bit science, a few diagnostics changed
  • 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 provide any additional information or relevant details below:

Update KE diagnostic

• Average U and V fields to T grid for KE calculation for B, C, and CD grid, raw U and V were combined with T grid variables in prior implementation.

Also

• Update max speed calculation for C grid, calc speed at both E and N points
• Refactor highfreq option u,v passed into icepack for windstress calculation
  • This is bit-for-bit
  • Create local variables uvelT_icep and vvelT_icep to store highfreq info
  • Compute [uvelT,vvelT]_icep at start of therm calc instead of end of dynamics calc
  • No longer need to recalc [uvelT,vvelT]_icep on restart
• Update some indentation in ice_diagnostics.F90

Closes #734
See also #655

[eclare108213]

This might break restarts from previous-version restart files, but that will be fine going forward and otherwise it looks good. Thanks for cleaning this up.

[apcraig]

This doesn't affect prior restarts. Nothing has changed on the restart file. With this update, we just compute two derived quantities in a different place, but it's still there.

[apcraig]

Test results are here, https://github.com/CICE-Consortium/Test-Results/wiki/cice_by_hash_forks#db254c11ba0a96b10f875a2d2003ec6aa9298073.

[eclare108213]

Looks good. Please merge when you're ready.