[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/proto/daemon.proto

@@ -168,7 +168,6 @@ message PeerState {
   string connStatus = 3;
   google.protobuf.Timestamp connStatusUpdate = 4;
   bool relayed = 5;
-  bool direct = 6;
   string localIceCandidateType = 7;
   string remoteIceCandidateType = 8;
   string fqdn = 9;
@@ -180,6 +179,7 @@ message PeerState {
   bool rosenpassEnabled = 15;
   repeated string routes = 16;
   google.protobuf.Duration latency = 17;
+  string relayAddress = 18;
 }
 
 // LocalPeerState contains the latest state of the local peer