Allow to use ON CLUSTER cluster_name in TRUNCATE syntax

[git-hulk]

See https://clickhouse.com/docs/en/sql-reference/statements/truncate#truncate-table

[git-hulk]

cc @iffyio

[git-hulk]

ON CLUSTER is a ClickHouse-specific syntax, but we don't add the dialect guard for the sake of keeping consistent with other places.

[coveralls]

Pull Request Test Coverage Report for Build 10860941542

Details

• 20 of 22 (90.91%) changed or added relevant lines in 4 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.001%) to 89.33%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
tests/sqlparser_common.rs	11	13	84.62%

Files with Coverage Reduction	New Missed Lines	%
src/ast/mod.rs	1	82.38%

Totals
Change from base Build 10817360923:	0.001%
Covered Lines:	29444
Relevant Lines:	32961

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💛 - Coveralls

[iffyio]

LGTM! cc @alamb

[alamb]

Thank yoU @iffyio and @git-hulk