tls_handshakes: add endpoint addresses to handshake list (#711)

* tls_handshakes: add IP addresses

* tls_handshakes: extract ip from tcp-connect

* tls_handshake: switched to trace event

* saver.go: get remoteAddr before handshake

Not sure whether this is strictly necessary, but I'd rather take the
remoteAddr before calling Handshake, just in case a future version
of the handshake closes the `conn`. In such a case, `conn.RemoteAddr`
would return `nil` and we would crash here.

This occurred to me while reading once again the diff before merging.

Co-authored-by: decfox <decfox>
Co-authored-by: Simone Basso <bassosimone@gmail.com>

internal/engine/netx/archival/archival.go

@@ -314,6 +314,7 @@ func NewTLSHandshakesList(begin time.Time, events []trace.Event) []TLSHandshake
 			continue
 		}
 		out = append(out, TLSHandshake{
+			Address:            ev.Address,
 			CipherSuite:        ev.TLSCipherSuite,
 			Failure:            NewFailure(ev.Err),
 			NegotiatedProtocol: ev.TLSNegotiatedProto,