fix(tools/mysql-list-tables): Update sql query to resolve subquery scope error (#1629)

## Description --- This change fixes the `Unknown column 'T.TABLE_SCHEMA'` error in the `mysql-list-tables` tool by refactoring a correlated subquery in the SQL query to list tables. ## PR Checklist --- > Thank you for opening a Pull Request! Before submitting your PR, there are a > few things you can do to make sure it goes smoothly: - [x] Make sure you reviewed [CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md) - [x] Make sure to open an issue as a [bug/issue](https://github.com/googleapis/genai-toolbox/issues/new/choose) before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea - [x] Ensure the tests and linter pass - [x] Code coverage does not decrease (if any source code was changed) - [x] Appropriate docs were updated (if necessary) - [x] Make sure to add `!` if this involve a breaking change 🛠️ Fixes #1624 Co-authored-by: Averi Kitsch <akitsch@google.com>

Author: Myst9

internal/tools/mysql/mysqllisttables/mysqllisttables.go

@@ -145,11 +145,10 @@ const listTablesStatement = `
  JSON_ARRAYAGG(S.COLUMN_NAME) AS INDEX_COLUMNS_ARRAY
  FROM
  INFORMATION_SCHEMA.STATISTICS S
- WHERE
- S.TABLE_SCHEMA = T.TABLE_SCHEMA AND S.TABLE_NAME = T.TABLE_NAME
  GROUP BY
  S.TABLE_SCHEMA, S.TABLE_NAME, S.INDEX_NAME
  ) AS IndexData
+ WHERE IndexData.TABLE_SCHEMA = T.TABLE_SCHEMA AND IndexData.TABLE_NAME = T.TABLE_NAME
  ORDER BY IndexData.INDEX_NAME
  ),
  'triggers', (