[8pt] Get Samples broken after new lidar bridges system

[RobHanna-NOAA]

Currently we have a PR / branch that is WIP for adding lidar bridges. A quick test against that branch for now, shows that get_sample_data is now broken.

It appears that it might just be a matter of adjusting some of the variable names and possibly adding a few more to the get_sample_data file.

The inline code variables that need to be added or adjusted: (from os.enviro / bash_variables.env)

• Remove: bathymetry_file

• Add: bathy_file_ehydro, bathy_file_aibased, and mannN_file_aibased

• Add (from lidar bridges): input_bridge_elev_diff, input_bridge_elev_diff_alaska

• Adjust: Was simply osm_bridges and is now osm_bridges and osm_bridges_alaska

[mluck]

The PR for adding lidar bridge elevations is now #1406.