[php-src] Issue #14258: Implement ED25519 auth for mysqlnd

Issue: https://github.com/php/php-src/issues/14258 Author: h3ssan ### Description ## Overview Since MariaDB 10.4 (**released ~5 years ago**) introduced an authentication method called auth_ed25519 and still supported till now in the latest versions of MariaDB which is now 11.3, [here's official to read more about auth_ed25519](https://mariadb.com/docs/server/security/authentication/enterprise-server/ed25519/) > Right now, all MariaDB supported versions are support > auth_ed25519 which as I said, since MariaDB > 10.4 ## The Problem As this code of PHP 8.1.0 ( Located in https://github.com/php/php-src/blob/php-8.1.0/ext/mysqlnd/mysqlnd_auth.c#L1315-L1326 ) mentioned below that auth_ed25519 is not supported yet. ```c /* {{{ mysqlnd_register_builtin_authentication_plugins */ void mysqlnd_register_builtin_authentication_plugins(void) { mysqlnd_plugin_register_ex((struct st_mysqlnd_plugin_header *) &mysqlnd_native_auth_plugin); mysqlnd_plugin_register_ex((struct st_mysqlnd_plugin_header *) &mysqlnd_pam_authentication_plugin); #ifdef MYSQLND_HAVE_SSL mysqlnd_plugin_register_ex((struct st_mysqlnd_plugin_header *) &mysqlnd_caching_sha2_auth_plugin); mysqlnd_plugin_register_ex((struct st_mysqlnd_plugin_header *) &mysqlnd_sha256_authentication_plugin); #endif } /* }}} */ ``` Also, here's what [official MariaDB](https://mariadb.com/kb/en/authentication-plugin-ed25519/) said about mysql_native_password:  ## The Requested Features - Implement ED25519 authentication for MySQL Native Driver (mysqlnd) ## More on this - [MariaDB - Authentication with ed25519](https://mariadb.com/docs/server/security/authentication/enterprise-server/ed25519/) - [MariaDB - Authentication Plugin - ed25519](https://mariadb.com/kb/en/authentication-plugin-ed25519/)