[relay] Feature/relay integration (#2244)

This update adds new relay integration for NetBird clients. The new relay is based on web sockets and listens on a single port.

- Adds new relay implementation with websocket with single port relaying mechanism
- refactor peer connection logic, allowing upgrade and downgrade from/to P2P connection
- peer connections are faster since it connects first to relay and then upgrades to P2P
- maintains compatibility with old clients by not using the new relay
- updates infrastructure scripts with new relay service

client/server/debug.go

@@ -369,8 +369,8 @@ func seedFromStatus(a *anonymize.Anonymizer, status *peer.FullStatus) {
 	}
 
 	for _, relay := range status.Relays {
-		if relay.URI != nil {
-			a.AnonymizeURI(relay.URI.String())
+		if relay.URI != "" {
+			a.AnonymizeURI(relay.URI)
 		}
 	}
 }