Enabled Participant Overview for Tutors when correcting normal exercise groups

.gitlab-ci.yml

core/tests/test_access_rights.py

core/tests/test_feedback.py

core/tests/test_student_reviewer_viewset.py

core/views/common_views.py

core/views/feedback.py

core/views/util.py

frontend/src/components/student_list/StudentList.vue

frontend/src/components/student_list/StudentListMenu.vue

frontend/src/pages/tutor/TutorLayout.vue

frontend/src/router/index.ts

util/factories.py