Adds new tags GST_TAG_GEO_LOCATION_COUNTRY,
GST_TAG_GEO_LOCATION_CITY and GST_TAG_GEO_LOCATION_SUBLOCATION.

API: GST_TAG_GEO_LOCATION_COUNTRY
API: GST_TAG_GEO_LOCATION_CITY
API: GST_TAG_GEO_LOCATION_SUBLOCATION

Fixes #612410