[FEATURE] Support GROUP BY ROLLUP(,) in MySQL Dialect

[Functor10]

tpc-ds27.sql
select i_item_id,
s_state, grouping(s_state) g_state,
avg(ss_quantity) agg1,
avg(ss_list_price) agg2,
avg(ss_coupon_amt) agg3,
avg(ss_sales_price) agg4
from store_sales, customer_demographics, date_dim, store, item
where ss_sold_date_sk = d_date_sk and
ss_item_sk = i_item_sk and
ss_store_sk = s_store_sk and
ss_cdemo_sk = cd_demo_sk and
cd_gender = 'F' and
cd_marital_status = 'W' and
cd_education_status = 'Primary' and
d_year = 1998 and
s_state in ('TN','TN', 'TN', 'TN', 'TN', 'TN')
group by rollup (i_item_id, s_state)
order by i_item_id
,s_state
limit 100;