GTEST/UCP: Fix max_lane test to run with proto v2 only

There is a max md limitation for RMA BW lanes in protov1.
Thus, it may not be possible to create 16 lanes with proto v1
if the node has many different transports/HCAs/NICs.

test/gtest/ucp/test_ucp_sockaddr.cc

@@ -1443,7 +1443,7 @@ class test_max_lanes : public test_ucp_sockaddr {
 
 UCS_TEST_SKIP_COND_P(test_max_lanes, 16_lanes_reconf, !cm_use_all_devices(),
                      "MAX_RNDV_LANES=16", "MAX_EAGER_LANES=16",
-                     "IB_NUM_PATHS?=16", "TM_SW_RNDV=y")
+                     "IB_NUM_PATHS?=16", "TM_SW_RNDV=y", "PROTO_ENABLE=y")
 {
     /* get configuration index for EP created through CM */
     listen_and_communicate(false, SEND_DIRECTION_C2S);