Adjustment to model NetCDF input file creation that align with FloPy #2417:

• Fix DIS mesh_face_x array, which was off by an index
• Rotate mesh x and y coordinates when angle of rotation has been specified
• Structured export projected coordinates are never rotated. Only translate if angrot is 0.0, otherwise leave in grid local coordinates.
• Structured exports support either latitude / longitude geographic coordinates or a projection variable for grid mapping via the wkt string but not both. Latitude and longitude coordinates can be rotated.
• change global attributes "modflow6_grid" and "modflow6_model" to "modflow_grid" and "modflow_model", as these identifiers might be more generally applied
• After FloPy PR is merged, a follow up PR will update autotests to use new functionality

Checklist of items for pull request

• Replaced section above with description of pull request
• Formatted new and modified Fortran source files with fprettify
• Updated definition files
• Removed checklist items not relevant to this pull request

For additional information see instructions for contributing and instructions for developing.