views_group_action-8.x-1.x-dev/templates/views-view-grid-group-action.html.twig

<div class="views-group-action-style-wrapper">
  <div class="original-style-wrapper">
    {% include include_template_file %}
  </div>
  <div class="views-group-action-form">{{ group_action_form }}</div>
</div>