Clean up NCBI geolocations

Initially noted in https://github.com/nextstrain/avian-flu/issues/131#issuecomment-2669590347 > Looks like there's a lot of mix ups of division vs location (e.g. a lot of records with location as "MA" and the division as specific town/cities). (Related to https://github.com/nextstrain/augur/issues/1578) > > Cleaning up the division/location should reduce the number of divisions.