Web installer should have an option to skip SMTP configuration

Feature requests
1

I currently have to change the passbolt.php config file manually to this:

// Email configuration.
‘EmailTransport’ => [
‘default’ => [
‘class’ => ‘Mail’,
],
];

everytime I do a reinstall/upgrade. It would be nice if the wizard would give an option to use plain PHP for sending mails instead of forcing you to enter fake SMTP credentials.