Make append and setLastQueuedCommand atomic

Two threads can enqueue to the same HostQueue (HostQueue::enqueue)
and result in last queued command being the first one reachine queue_.enqueue

NOTE: Temporarly make setLastQueuedCommand empty function to pass the build

Change-Id: Id09c3a28d184986f52b2ec86a2f6a18c40df1f0b

rocclr/platform/command.cpp

@@ -258,9 +258,6 @@ void Command::enqueue() {
 
   ClPrint(LOG_DEBUG, LOG_CMD, "command is enqueued: %p", this);
   queue_->append(*this);
-  if (IS_HIP) {
-    queue_->setLastQueuedCommand(this);
-  }
   queue_->flush();
   if ((queue_->device().settings().waitCommand_ && (type_ != 0)) ||
       ((commandWaitBits_ & 0x2) != 0)) {