Simplify the Stimulus Controller

[Spomky]

Description

The Stimulus Controller continued growing.
It should be better to split it and simplify the number of options.
This change will permit the controller to be in line with the last security changes.

It could use targets for username/assertion or any other option such as user verification or authenticator selection.

Example

{% extends 'base.html.twig' %}
​
{% block body %}
    {% if error is defined %}
        <div>{{ error.messageKey|trans(error.messageData, 'security') }}</div>
    {% endif %}
​
    <form
        action="{{ path('app_login') }}"
        method="post"
        {{ stimulus_controller('@web-auth/login',
             {
                 useBrowserAutofill: true,
                 requestOptionsUrl: path('webauthn.controller.request.request.login'),
             }
        ) }}
    >
        <label for="username">Usenrame:</label>
        <input
                    type="text"
                    id="username"
                    name="_username"
                    value="{{ last_username }}"
                    placeholder="Type your username here"
                    autocomplete="username webauthn"
                    {{ stimulus_target('@web-auth/login', 'username') }}
        >
        <input
                   type="hidden"
                   id="assertion"
                   name="_assertion"
                   {{ stimulus_target('@web-auth/login', 'assertion') }}
        >
        <button
                     id="login"
                     name="login"
                     type="submit"
                    {{ stimulus_action('@web-auth/login', 'login') }}
        >login</button>
    </form>
{% endblock %}