update interop tests for go-libp2p v0.16

[marten-seemann]

Due to the introduction of circuit v2, (for now) the node behind the firewall has to be configured to use the relay node (as a static relays).
The configuration change needed is pretty straightforward: https://github.com/ipfs/go-ipfs/blob/fde7d01a790254ae23e666dcf2eb9ec16a53fe7c/test/sharness/t0182-circuit-relay.sh#L27-L36.

However, I'm not sure how to do the change here. I assume we'd have to create a createGoRelay function:

interop/test/utils/circuit.js

Lines 57 to 72 in b361f74

	export function createGo (addrs, factory) {
	return factory.spawn({
	type: 'go',
	ipfsOptions: {
	config: {
	Addresses: {
	Swarm: addrs
	},
	Swarm: {
	DisableRelay: false,
	EnableRelayHop: true
	}
	}
	}
	})
	}

and then change the createGo function such that it uses that relay.