Upscale some results in order to simplify comparison with pg-version (ydb-platform#6130)

Author: resetius

ydb/library/benchmarks/gen_queries/consts.yql

@@ -15,3 +15,4 @@ $z0_9_35 = 0.9;
 $z1_1_35 = 1.1;
 
 $round = ($x, $y) -> { return Math::Round($x, $y); };
+$upscale = ($x) -> { return $x; };

ydb/library/benchmarks/gen_queries/consts_decimal.yql

@@ -14,3 +14,4 @@ $z0_05_35 = cast("0.05" as decimal(35,2));
 $z0_9_35 = cast("0.9" as decimal(35,2));
 $z1_1_35 = cast("1.1" as decimal(35,2));
 $round = ($x,$y) -> {return $x;};
+$upscale = ($x) -> { return cast($x as decimal(35,9)); };

ydb/library/benchmarks/queries/tpcds/yql/q20.sql

@@ -8,7 +8,7 @@ select  item.i_item_id
        ,item.i_class
        ,item.i_current_price
        ,sum(cs_ext_sales_price) as itemrevenue
-       ,sum(cs_ext_sales_price)*100/sum(sum(cs_ext_sales_price)) over
+       ,$upscale(sum(cs_ext_sales_price)*100)/sum($upscale(sum(cs_ext_sales_price))) over
            (partition by item.i_class) as revenueratio
  from	{{catalog_sales}} as catalog_sales
      cross join {{item}} as item

ydb/library/benchmarks/queries/tpcds/yql/q36.sql

@@ -3,14 +3,14 @@
 -- NB: Subquerys
 -- start query 1 in stream 0 using template query36.tpl and seed 1544728811
 select
-    sum(ss_net_profit)/sum(ss_ext_sales_price) as gross_margin
+    $upscale(sum(ss_net_profit))/$upscale(sum(ss_ext_sales_price)) as gross_margin
    ,item.i_category
    ,item.i_class
    ,grouping(item.i_category)+grouping(item.i_class) as lochierarchy
    ,rank() over (
  	partition by grouping(item.i_category)+grouping(item.i_class),
  	case when grouping(item.i_class) = 0 then item.i_category else null end
- 	order by sum(ss_net_profit)/sum(ss_ext_sales_price) asc) as rank_within_parent
+ 	order by $upscale(sum(ss_net_profit))/$upscale(sum(ss_ext_sales_price)) asc) as rank_within_parent
  from
     {{store_sales}} as store_sales
    cross join {{date_dim}}       d1