Add the ability to use the sun2 integration

[oesnith]

I use the sun2 integration to do some automation based on a different location. I'd love to use AL to enhance that, but it's tied to the location of my Home Assistant, not where I'd like to trigger off of. It'd be awesome to have the ability to select either your home location, or any of the sun2 integration instances created.

This is the link to the sun2 integration:
https://github.com/pnbruckner/ha-sun2