service/dap: fix compile error from merge conflict (#2818)

Co-authored-by: Polina Sokolova <polinasok@users.noreply.github.com>

Author: polinasok

cmd/dlv/dlv_test.go

@@ -867,7 +867,7 @@ func TestRemoteDAPClientAfterContinue(t *testing.T) {
 	c.ContinueRequest(1)
 	c.ExpectContinueResponse(t)
 	c.DisconnectRequest()
-	c.ExpectOutputEventClosingClient(t)
+	c.ExpectOutputEventClosingClient(t, "running")
 	c.ExpectDisconnectResponse(t)
 	c.ExpectTerminatedEvent(t)
 	c.Close()

service/dap/server.go

@@ -499,7 +499,7 @@ func (s *Session) address() string {
 	if s.config.Listener != nil {
 		return s.config.Listener.Addr().String()
 	}
-	if netconn, ok := s.conn.(net.Conn); ok {
+	if netconn, ok := s.conn.ReadWriteCloser.(net.Conn); ok {
 		return netconn.LocalAddr().String()
 	}
 	return ""