[feature](Nereids)add the ability of projection on each ExecNode and add column prune on OlapScan (#11842)

We have added logical project before, but to actually finish the prune to reduce the data IO, we need to add related supports in translator and BE.
This PR:
- add projections on each ExecNode in BE
- translate PhysicalProject into projections on PlanNode in FE
- do column prune on ScanNode in FE

Co-authored-by: HappenLee <happenlee@hotmail.com>

be/src/vec/exec/vassert_num_rows_node.cpp

@@ -51,8 +51,8 @@ Status VAssertNumRowsNode::get_next(RuntimeState* state, Block* block, bool* eos
     INIT_AND_SCOPE_GET_NEXT_SPAN(state->get_tracer(), _get_next_span,
                                  "VAssertNumRowsNode::get_next");
     SCOPED_TIMER(_runtime_profile->total_time_counter());
-    RETURN_IF_ERROR_AND_CHECK_SPAN(child(0)->get_next(state, block, eos), child(0)->get_next_span(),
-                                   *eos);
+    RETURN_IF_ERROR_AND_CHECK_SPAN(child(0)->get_next_after_projects(state, block, eos),
+                                   child(0)->get_next_span(), *eos);
     _num_rows_returned += block->rows();
     bool assert_res = false;
     switch (_assertion) {