Use Mapbox Geocoder API instead of Algolia Places for address autocomplete and Latitude and Longitude data

[webaissance]

Algolia Places is currently being used for the address autocomplete feature and for getting latitude and longitude data.
This needs to be replaced for a few reasons

1. The service is being sunsetted: https://www.algolia.com/blog/product/sunsetting-our-places-feature/
2. The results for latitude and longitude are not fully accurate. See this page: Accuracy of address results lat/lng ? algolia/places#500

We already use the Mapbox api for other functions - so let's use it for the address autocomplete and lat and long data as well.