rust: Use SQL formatting

[def-]

For context see https://materializeinc.slack.com/archives/C08A62E0751/p1771412204274059

For our internal SQL we should probably switch to a proper SQL query builder that automatically does the escaping

The interface is inspired by https://www.psycopg.org/psycopg3/docs/api/sql.html, but uses macros for compile-time guarantees. The idea is to enforce building SQL strings properly, without injection.

[github-actions]

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