YQL: Skip Hybrid for false UseSystemColumns pragma (#10710)

Author: mxkovalev

ydb/library/yql/providers/yt/provider/yql_yt_dq_hybrid.cpp

@@ -78,6 +78,11 @@ class TYtDqHybridTransformer : public TOptimizeTransformerBase {
         if (operation.Ref().StartsExecution() || operation.Ref().HasResult())
             return false;
 
+        if (!State_->Configuration->UseSystemColumns.Get().GetOrElse(DEFAULT_USE_SYS_COLUMNS)) {
+            PushSkipStat("FalseSystemColumns", nodeName);
+            return false;
+        }
+
         if (operation.Output().Size() != 1U) {
             PushSkipStat("MultipleOutputs", nodeName);
             return false;