[enhancement](profilev2) add some fields for profile v2 (#25611)

Add 3 counters for ExecNode:

ExecTime - Total execution time(excluding the execution time of children).
OutputBytes - The total number of bytes output to parent.
BlockCount - The total count of blocks output to parent.

be/src/vec/exec/distinct_vaggregation_node.cpp

@@ -35,6 +35,7 @@ DistinctAggregationNode::DistinctAggregationNode(ObjectPool* pool, const TPlanNo
 
 Status DistinctAggregationNode::_distinct_pre_agg_with_serialized_key(
         doris::vectorized::Block* in_block, doris::vectorized::Block* out_block) {
+    SCOPED_TIMER(_exec_timer);
     SCOPED_TIMER(_build_timer);
     DCHECK(!_probe_expr_ctxs.empty());
 
@@ -82,6 +83,7 @@ Status DistinctAggregationNode::_distinct_pre_agg_with_serialized_key(
 void DistinctAggregationNode::_emplace_into_hash_table_to_distinct(IColumn::Selector& distinct_row,
                                                                    ColumnRawPtrs& key_columns,
                                                                    const size_t num_rows) {
+    SCOPED_TIMER(_exec_timer);
     std::visit(
             [&](auto&& agg_method) -> void {
                 SCOPED_TIMER(_hash_table_compute_timer);