test: fix flaky interop tests - address already in use #5055

Job	Run time
Build	3m 24s
Test example js-libp2p-example-chat	1m 24s
Test example js-libp2p-example-connection-encryption	1m 10s
Test example js-libp2p-example-circuit-relay	1m 23s
Test example js-libp2p-example-delegated-routing	1m 54s
Test example js-libp2p-example-pubsub	1m 1s
Test example js-libp2p-example-discovery-mechanisms	1m 8s
Test example js-libp2p-example-custom-protocols	1m 3s
Test example js-libp2p-example-protocol-and-stream-muxing	1m 13s
Test example js-libp2p-example-peer-and-content-routing	1m 14s
Test example js-libp2p-example-browser-pubsub	1m 44s
Test example js-libp2p-example-pnet	1m 11s
Test example js-libp2p-example-transports	1m 4s
Test example js-libp2p-example-webrtc-private-to-private	1m 55s
Test example js-libp2p-example-webrtc-private-to-public	1m 46s
	22m 34s

Provide feedback