Feat: move netcdf_io utility from DAS

[mackenzie-grimes-noaa]

Linear Issue

Related to IDSSE-378

Changes

• Migrate netcdf_io module from DAS to the commons library

  • read_netcdf() was previously only needed for DAS (since RiskProcessor had its own Java implementation) but RiskProcessor will need to read netCDF files using Python now too
  • Moved all unit tests/test data from DAS as well

• Combined the read_netcdf and read_netcdf_with_h5 functions

  • Default is to use netCDF4 library. This is the only library used by "operational" DAS code currently.
  • We can still use h5netcdf library if we want to, by passing optional use_h5_lib=True to read_netcdf or write_netcdf

[Geary-Layne]

Looks good

[mackenzie-grimes-noaa]

@Geary-Layne do you know how dependencies of this library are managed/declared for other repos to use it? Add it to the setup.py? Or something to do with the Docker images that get built?

Even after merging this PR, DAS is complaining that the commons library doesn't have the netCDF4 library installed. (Failed pytest in DAS repo)

[Geary-Layne]

My guess is that base c library needed for netcdf4 hasn't been installed for the python interpreter used by commons.