[php-src] PR #25016: ext/pdo_firebird: Fix GH-25006 getColumnMeta() bounds check

Pull Request: https://github.com/php/php-src/pull/25016 Author: iliaal pdo_firebird_stmt_get_column_meta() indexed out_sqlda.sqlvar[colno] before PDO checked colno against column_count. column_count is the number of XSQLVAR slots allocated with XSQLDA_LENGTH(). A near index read past that allocation and the core then raised SQLSTATE 07009. A far index faulted. The hook now returns an empty array without reading sqlvar when colno is outside that range, and the existing core check raises 07009. describe and get_col are already limited by their callers. param_hook already rejects paramno >= sqld. Returning FAILURE from this hook would return false instead, because the statement error is cleared before the driver runs. Fixes #25006