Add location variable to state of some policies

[aayjain21]

Add geolocation to internal state.
(longitude + latitude used to determine local electricity cost and simulate+model latencies.)
As part of the mandatory state, we need the "location" variable.

This is also a variable known only to the agent itself, which is used to determined the local electricity cost and will help us model latencies.

While longitude/latitude make sense, let's see what we can find in terms of latency models and electricity cost datasets geometry.