message: [XLA:GPU] Add xla_hlo_profile support to nccl-all-reduce-thunk.
  Previously this op wouldn't show up in profiles.
diff: @@ -636,6 +636,9 @@ static std::vector<int64> GetParticipatingReplicas(
  }
  Status NcclAllReduceThunk::ExecuteOnStream(const ExecuteParams& params) {
  + auto op_profiler =
  + params.profiler->MakeScopedInstructionProfiler(hlo_instruction());
  +
  auto* instr = Cast<HloAllReduceInstruction>(hlo_instruction());
  int64 device_ordinal = params.stream->parent()->device_ordinal();
  