Field formatters now pass their third party settings

Field formatters will now pass their third party settings as part of their render array.

An example usage is to create additional template suggestions:

/**
 * Implements hook_theme_suggestions_HOOK_alter().
 */
function my_module_theme_suggestions_field_alter(&$suggestions, array $variables) {
  $third_party_setting = $variables['element']['#third_party_settings']['my_module']['foo'];
  $suggestions[] = 'field__' . $third_party_setting;
}