Add the ability to call the same method multiple times via config actions

Problem/Motivation

The ConfigActions API added in #3284025: Add configuration actions API allows methods on config entities to be attributed and made callable via the config actions API.

A classic use case will be the ability to add permissions to a user role using \Drupal\user\Entity\Role::grantPermission() and the entity_method:user_role:grantPermission action. The signature of this method is:

  /**
   * Grant permissions to the role.
   *
   * @param string $permission
   *   The permission to grant.
   *
   * @return $this
   */
  public function grantPermission($permission);

Therefore we can only add one permission at a time. To translate this into a recipe it looks something like:

config:
  actions:
    user.role.editor:
      grantPermission: 'delete any article content'

It would be ideal if we can tell the config action system to turn the following structure

config:
  actions:
    user.role.editor:
      grantPermission:
        - 'delete any article content'
        - 'edit any article content'

into multiple calls to ::grantPermission() to add the two permissions.

Proposed resolution

Allow the \Drupal\Core\Config\Action\Attribute\ActionMethod attribute to carry extra data about how to handle arrays of arguments. Add logic to \Drupal\Core\Config\Action\Plugin\ConfigAction\Deriver\EntityMethodDeriver and \Drupal\Core\Config\Action\Plugin\ConfigAction\EntityMethod to support this.

The EntityMethodDeriver adds an extra pluralized actions for all entity method where the pluralize attribute property is not set to false. The default behaviour is to add an additional action with the letter 's' appended. The pluralized name can be completely overridden by setting the attribute property to a string.

Methods can configure this on the attribute itself:

  #[ActionMethod(pluralize: 'addRoleMultiple')]
  public function addRole($role) {

This will create an action called addRoleMultiple as well as the normal addRole action

The default behaviour will use \Symfony\Component\String\Inflector\EnglishInflector::pluralize() to generate a plural form.

  #[ActionMethod()]
  public function grantPermission($permission) {

This will create an action called grantPermissions as well as the normal grantPermission action. Something like addProperty will become addProperties.

To disable pluralized actions

  #[ActionMethod(pluralize: FALSE)]
  public function setRole($role) {

This will only create an action called setRole.

For recipes this means that granting multiple permissions to a role becomes:

config:
  actions:
    user.role.editor:
      grantPermissions:
        - 'delete any article content'
        - 'edit any article content'

Remaining tasks

User interface changes

API changes

Data model changes