[request] Fetch altitude for geocode

[mjmadsen]

Related #2762, #3621, #3808, #4114 but I wanted an explicit post for the issue. It will probably take me more time to write than some of our more skilled devs.

1. Add a wrapper for api.set_position in api wrapper (parameters: long/lat)
2. Swap all calls to api.set_position with new wrapper
3. Use geocoder to fetch altitide from long/lat using something similar to below:
   import geocoder
   g = geocoder.google([long, lat], method='elevation')
   alt = g.meters
4. Send api.set_position with altitude

(Source https://geocoder.readthedocs.io/providers/Google.html#elevation)