Improve Bing imports

[r-akemii]

As for March 2023, our current pipeline consists in loading Microsoft Bing URLs and checking if the model place is within a country or is a country with any available data. If it has, then we download all country data. In case the model place is a country, we're good, but if it's not, then we're downloading several unused files. Thus the improvement here would be in only downloading the necessary data (and making the URL loading faster).