[sql-parser] Add seed corpus for fuzzing

[renatahodovan]

This patch adds a seed corpus for fuzz_sql_parse by including test queries from the sql-parser repository.

[github-actions[bot]]

renatahodovan is a new contributor to projects/sql-parser. The PR must be approved by known contributors before it can be merged. The past contributors are: DonggeLiu

[renatahodovan]

I don't think the missing bison issue in several checks is related to the commit. I suppose a restart would probably solve it.

[jonathanmetzman]

@DavidKorczynski sorry for the many pings, do you know the github username of any of the maintainers?