Improve unparsing for ORDER BY with Aggregation functions

[sgrebnov]

Which issue does this PR close?

PR improves unparsing to handle cases when ORDER BY clause contains aggregation functions that needs to be unprojected, otherwise it will result in unparsed/incorrect sql - Referenced column "sum(catalog_returns.cr_net_loss)" not found in FROM clause / Referenced column "count(DISTINCT cs1.cs_order_number)" not found in FROM clause

For example TPC-DS Q92

Referenced column "sum(catalog_returns.cr_net_loss)" not found in FROM clause

select  dt.d_year
 	,item.i_category_id
 	,item.i_category
 	,sum(ss_ext_sales_price)
 from 	date_dim dt
 	,store_sales
 	,item
 where dt.d_date_sk = store_sales.ss_sold_date_sk
 	and store_sales.ss_item_sk = item.i_item_sk
 	and item.i_manager_id = 1
 	and dt.d_moy=11
 	and dt.d_year=1998
 group by 	dt.d_year
 		,item.i_category_id
 		,item.i_category
 order by       sum(ss_ext_sales_price) desc,dt.d_year
 		,item.i_category_id
 		,item.i_category
 LIMIT 100 ;

This fixes unparsing for TPC-DS benchmark queries 16, 42, 62, 91, 92, 94, 95, 99