Clean up EIA-NEMS processing

[atpham88]

Summary

This PR:

• Removes all the scripts that assign resources to rsc units in NEMS (this step is now done in main ReEDS repo)
• Cleans up NEMS by removing all columns that are not used in ReEDS or not informative
• Includes minor update in geospatial mapping script for more accurate nearest distance calculation
• Removes # character in T_UID

Technical details

Issues resolved

• Recapture some missing capacity due to comment=# when read in unitdata.csv in main ReEDS repo, which ignores all the data after unit ID of the rows where unit ID (T_UID) has # character

Relevant sources or documentation

Additional details

• Output verification: what did you do to verify the outputs?
  There is no change in outputs