Remove WaitingRound, AwaitTopUpRound

[Karrenbelt]

WaitingRound

the waiting round logic, required because of the bond_time, can be subsumed by the path selection round, where this currently already being checked, or preferably; moved to the activation round entirely (and this logic removed from path selection).

AwaitTopUpRound

• relates to: Feat/await top up #104 (comment)

We may also remove the AwaitTopUpRound and in case of insufficient funds redirect to PathSelection (self) instead, or a degenerate state, which we can direct it to PathSelection in the during ABCIApp chaining; then someone else might direct this elsewhere in another setup (e.g. refueling).