[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/vtable_function_node.cpp

@@ -101,6 +101,7 @@ bool VTableFunctionNode::_is_inner_and_empty() {
 Status VTableFunctionNode::prepare(RuntimeState* state) {
     SCOPED_TIMER(_runtime_profile->total_time_counter());
     RETURN_IF_ERROR(ExecNode::prepare(state));
+    SCOPED_TIMER(_exec_timer);
 
     _num_rows_filtered_counter = ADD_COUNTER(_runtime_profile, "RowsFiltered", TUnit::UNIT);
     for (auto fn : _fns) {