National Park- SPEC_LOCALITY CLEANUP

[mkoo]

related to this I have something like 20000-30000 records from Denali National Park that now have spec_locs like:

Denali National Park and Preserve, Above Nenana R., Denali National Park and Preserve or Denali NPP, Above Nenana R., Denali National Park and Preserve

And of course, plenty of others from other National Parks in Alaska with the same sort of problem.

To fix these, they should be changed to remove the final string after the comma (incl. the comma) if that string matches the starting string for the first word.

Originally posted by @DerekSikes in https://github.com/ArctosDB/arctos/issues/6376#issuecomment-1574354368