[php-src] Issue #11950: mysqlnd: error message is inappropriate in some cases

Issue: https://github.com/php/php-src/issues/11950 Author: SakiTakamachi ### Description This is an issue I noticed while working on this fix. https://github.com/php/php-src/pull/11912 This line sets the CR_MALFORMED_PACKET error. https://github.com/php/php-src/blob/f907a009f9d4c6a72ad756f57b9c3ebf0eeb8666/ext/mysqlnd/mysqlnd_wireprotocol.c#L2471 However, the CR_SERVER_GONE_ERROR error may already be set at this point. https://github.com/php/php-src/blob/f907a009f9d4c6a72ad756f57b9c3ebf0eeb8666/ext/mysqlnd/mysqlnd_wireprotocol.c#L297 Therefore, a CR_SERVER_GONE_ERROR error is output when an CR_MALFORMED_PACKET error should be output. ``` Fatal error: Uncaught mysqli_sql_exception: Malformed packet in /var/www/html/test/test.php:11 ``` I get the following error message in the same situation when building with libmysqlclient : ``` Fatal error: Uncaught mysqli_sql_exception: Lost connection to MySQL server during query in /var/www/html/test/test.php:11 ``` The code to reproduce: ```php <?php $driver = new mysqli_driver(); $driver->report_mode = MYSQLI_REPORT_ERROR|MYSQLI_REPORT_STRICT; $mysqli = new mysqli("mysql", "root", "", "test"); // my env fgets(STDIN); // Restarted mysql, then press enter var_dump($mysqli->select_db("test2")); ``` ### PHP Version PHP 8.0+ ### Operating System _No response_