Fix minor problems on snow1 branch in io binary and pnetcdf implementation

[apcraig]

PR checklist

• Short (1 sentence) summary of your PR:
  Fix minor problems on snow1 branch in io binary and pnetcdf implementation
• 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.
  before had 49 failures, after none. Several results are not bit-for-bit in regression testing but that's a separate issue. https://github.com/CICE-Consortium/Test-Results/wiki/cice_by_hash_forks#6cf44dcb4bdaae6aa232e6b986328d13cb4d0cd7
• 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 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:

This is a PR to a branch to fix a couple minor bugs.

It also updates the branch to the latest CICE-Consortium master

[eclare108213]

@apcraig explains the failing checks:
The CICE testing doesn't work in GHActions because it's missing the new Icepack code. When we're testing CICE+snow now, we're manually updating Icepack. The automated GHActions testing doesn't do that. This won't work until Icepack is updated on this branch of CICE.

I will merge this PR so that we can continue testing with up-to-date code and fix additional problems as they come up.