fix(grb): update binary grid file reader for new grid types

[christianlangevin]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 35.71429% with 9 lines in your changes are missing coverage. Please review.

Project coverage is 71.1%. Comparing base (f4a4274) to head (6388d25).
Report is 2 commits behind head on develop.

❗ Current head 6388d25 differs from pull request most recent head baa6ec6. Consider uploading reports for the commit baa6ec6 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #2157     +/-   ##
=========================================
- Coverage     72.9%   71.1%   -1.9%     
=========================================
  Files          260     260             
  Lines        58119   58132     +13     
=========================================
- Hits         42398   41356   -1042     
- Misses       15721   16776   +1055     

Files	Coverage Δ
flopy/mf6/utils/binarygrid_util.py	89.9% <35.7%> (-2.5%)	⬇️

... and 64 files with indirect coverage changes