feat(netcdf): support model ugrid layered mesh exports

[mjreno]

• DIS/DISV GWF/GWE/GWT models supported
• All data written as layered variables
• Dependent model variable exported with EXPORT_NETCDF UGRID name file option
  • No other options or configuration required beyond this option
• GRIDDATA input arrays written with package option EXPORT_ARRAY_NETCDF
• Grid mapping variable added by configuring NCF6 package with OGC_WKT option
  • All export arrays associated with mesh
• Additional NCF6 options:
  • DEFLATE <integer> (per variable compression 0-9)
  • SHUFFLE keyword (variable byte shuffling which can improve compression)
    • only applied with DEFLATE option provided
  • CHUNKING_UGRID record (per variable time and face dimension chunk sizes)
• Unsupported release so no documentation yet included
• Extended executable CI test added
  • Linux/MacOS tests included, Windows not yet tested

[langevin-usgs]

Looks good. One minor comment about testing, but think it can be handled later.

[langevin-usgs]

If this model is the same as test_gwe_cnd, is it possible to just import build_models, etc. from the test_gwe_cnd python source file? I think that's how some of the parallel tests are constructed. Would need some way to inject the export_array_netcdf=True into the relevant packages. Just a suggestion as a way to remove duplication. Comment applies to the other tests as well, but maybe best left for a subsequent PR.

[mjreno]

I agree something along those lines would be a better approach to eliminate the redundancy and improve maintainability. I'll plan to make these updates soon.