Segregate the error that occurs while attempting to build a Circuit through tor_circmgr::CircuitBuilder

Currently, we have erpc-scanner module within the application that handles the attempt of creating a two hop circuit, through the CircuitBuilder. We consider ANY error produced while trying to create a Circuit through this CircuitBuilder as a possible partition of the those two relay involved in the two hop circuit.

So, sometimes in the future we might need to segregate these errors at tor_circmgr::Error produced by CircuitBuilder, and filter out which error's actually mean that the two relay's just CANT COMMUNICATE, kind of segregating from errors similar to failed to build the first hop, which i believe doesn't matter because we're only interested in if those two relays can communicate or not i.e can the first relay extend the circuit to second relay?