parser: QBit data type support via simplified identifier handling

[ajruckman]

Updates parseLiteral() to handle identifiers like Float32 (previously only handled literals) and return *Ident directly. Remove unnecessary parseTypeParameter() wrapper; parseLiteral just needed a new case to handle TokenKindIdent which is now possible.

This allows us to add QBit case to the column type parser to support it in ClickHouse 25.10: https://clickhouse.com/docs/sql-reference/data-types/qbit

[coveralls]

Pull Request Test Coverage Report for Build 18885628675

Details

• 7 of 8 (87.5%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 50.254%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
parser/parser_common.go	2	3	66.67%

Totals
Change from base Build 18873747432:	0.01%
Covered Lines:	7513
Relevant Lines:	14950

---

💛 - Coveralls

[git-hulk]

@ajruckman Thank you for your contributions.