Add mariadb installation option

[Jubeki]

Laravel 11 will support a new Maria DB Configuration in config/database.php (due to slimming the skeleton this will be moved to the framework).

A developer should be able to select the option mariadb during installation. Which will fallback to mysql in Laravel 10 and will use the mariadb configuration in Laravel 11.

Note: This PR will be draft until the slimmed skeleton is merged. Because the Slimmed skeleton branch is not working, I can not verify if everything works as intended.

Works on the master branch and the 10.x branch

Tested as follows:
Replace the file in ~/.composer/vendor/laravel/installer/src/NewCommand.php
Run laravel new l11 --dev and select database mariadb => .env should contain mariadb
Run laravel new l10 and select database mariadb => .env should contain mysql