[php-src] PR #25350: ext/dba: Fix dba_close() not closing a dba_popen() connection

Pull Request: https://github.com/php/php-src/pull/25350 Author: iliaal After dba_popen(), dba_close() left the file open and its lock held until shutdown, because it looked up the persistent entry after dba_close_connection() had already cleared connection->info. Count connections on the persistent resource's refcount again, as PHP 8.3 did, so the last dba_close() closes the handle. A handle sharing its stream with another persistent handle (modes rl and rd on one file) stays open, as before. Lock checks also see persistent handles still in use. Girgias pointed this out on #25155.