FEAT #11861 TIME 2 add allowed groups for admin_users

.../administration/group/group-administration.component.html

.../administration/group/group-administration.component.scss

...pp/administration/group/group-administration.component.ts

...p/administration/group/groups-administration.component.ts

src/frontend/lang/lang-en.ts

src/frontend/lang/lang-fr.ts

src/frontend/lang/lang-nl.ts

src/frontend/service/privileges.service.ts