fix: Parsing on multiple union distinct and except

[erezrokah]

Parsing failed if you had multiple union distinct or except. This PR fixes it by doing the same thing as union all

clickhouse-sql-parser/parser/parser_query.go

Line 799 in 7bdfc48

unionAllExpr, err := p.parseSelectQuery(p.Pos())

Added tests that are failing without this PR

[coveralls]

Pull Request Test Coverage Report for Build 17813370117

Details

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 50.072%

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Totals
Change from base Build 17784400776:	0.02%
Covered Lines:	7293
Relevant Lines:	14565

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💛 - Coveralls

[git-hulk]

@erezrokah Thanks for your fix.