Support WITH ROLLUP

[ea-rus]

Example:

SELECT country, year, genre, SUM(sales) 
  FROM booksales GROUP BY country, year, genre WITH ROLLUP;

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
mindsdb_sql_parser
__about__.py	10	10	0%	1–10
__init__.py	116	21	82%	43, 47, 93, 110, 134–153, 160–161
lexer.py	276	21	92%	362, 364, 366, 378, 380, 382, 388–406
logger.py	19	4	79%	14, 17, 23, 26
parser.py	1071	28	97%	120, 124, 263, 288, 385, 571, 588, 612–613, 821, 875, 952, 1043, 1096, 1106, 1145–1146, 1175, 1186, 1269, 1345, 1384, 1420, 1946, 1954, 2007–2010
utils.py	46	4	91%	73–79
mindsdb_sql_parser/ast
base.py	36	5	86%	13, 28, 31, 46, 51
create.py	80	12	85%	23–31, 92–97
drop.py	52	2	96%	10, 13
insert.py	63	4	94%	39–41, 46
show.py	48	1	98%	18
update.py	53	5	91%	40–42, 75–76
mindsdb_sql_parser/ast/mindsdb
knowledge_base.py	46	1	98%	79
mindsdb_sql_parser/ast/select
case.py	38	2	95%	19, 22
constant.py	36	1	97%	23
data.py	11	4	64%	10–12, 15, 19
identifier.py	71	8	89%	47, 91–96, 103
native_query.py	13	1	92%	25
operation.py	139	4	97%	56, 65, 177, 201
parameter.py	11	1	91%	10
select.py	109	3	97%	161–166
star.py	12	2	83%	8–9
TOTAL	3240	144	96%

Tests	Skipped	Failures	Errors	Time
286	0 💤	0 ❌	0 🔥	17.147s ⏱️