updates for cice bfb, fix build, remove dead cpps

[apcraig]

Updates needed for CICE bfb branch

• Developer(s): tcraig

• Are the code changes bit for bit, different at roundoff level, or more substantial? bit-for-bit, #03fce56e, https://github.com/CICE-Consortium/Test-Results/wiki/icepack_by_hash_forks

• Does this PR create or have dependencies on CICE or any other models? CICE bfb needs this

• Is the documentation being updated with this PR? (Y/N) Y

• Other Relevant Details:

Fixed a problem in the build where the cpps were not being processed properly.
Removed dead cpps and dead cice_settings.
Added integer8 kind and updated real16 kind.

[dabail10]

Looks good. I was unaware that CAM_ICE, DITTO, and BARRIERS were no longer used. I don't have them in CESM-CICE5. Thanks for doing this cleanup.

[eclare108213]

It makes sense that these cpps are not needed for Icepack. They might still be used for CICE, but that would be a separate set of changes.