[opt](memory) QueryMemTracker not equal to 0 will crash at query end …

…when Debug compile (apache#35014)

to eliminate query memory leak !!!

be/src/runtime/memory/mem_tracker_limiter.cpp

@@ -125,7 +125,7 @@ MemTrackerLimiter::~MemTrackerLimiter() {
             "4. If you need to "
             "transfer memory tracking value between two trackers, can use transfer_to.";
     if (_consumption->current_value() != 0) {
-        // TODO, expect mem tracker equal to 0 at the task end.
+        // TODO, expect mem tracker equal to 0 at the load/compaction/etc. task end.
 #ifndef NDEBUG
         if (_type == Type::QUERY) {
             std::string err_msg =