[Proposal] Add Bokoblinet as a verifier for amplifier to the Axelar testnet

[StephenFluin]

This is a testnet-only verifier that will be used to prove out processes on the testnet. It is expected to have high availability, but low decentralization.

Verifier address: axelar16dxsfhyegy40e4eqfxee5jw5gyy2xxtcw4t2na