Adds few more gitlab group options (#3248)

* Adds few more gitlab group options

* Update plugins/modules/source_control/gitlab/gitlab_group.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Removes default for new string options

* Removes default from argument_spec

* Adds changelog fragment

* Update plugins/modules/source_control/gitlab/gitlab_group.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/source_control/gitlab/gitlab_group.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/source_control/gitlab/gitlab_group.py

Co-authored-by: Felix Fontein <felix@fontein.de>

Co-authored-by: Maik Schueller <maik.schueller@sap.com>
Co-authored-by: Felix Fontein <felix@fontein.de>

tests/integration/targets/gitlab_group/tasks/main.yml

@@ -72,3 +72,28 @@
   assert:
     that:
       - gitlab_group_state_desc.group.description == "My Test Group"
+
+- name: Cleanup GitLab Group for project_creation_level Test
+  gitlab_group:
+    api_url: "{{ gitlab_host }}"
+    validate_certs: false
+    api_token: "{{ gitlab_login_token }}"
+    name: ansible_test_group
+    path: ansible_test_group
+    state: absent
+
+- name: Create GitLab Group for project_creation_level Test
+  gitlab_group:
+    api_url: "{{ gitlab_host }}"
+    validate_certs: false
+    api_token: "{{ gitlab_login_token }}"
+    name: ansible_test_group
+    path: ansible_test_group
+    project_creation_level: noone
+    state: present
+  register: gitlab_group_state_pcl
+
+- name: Test group created with project_creation_level
+  assert:
+    that:
+      - gitlab_group_state_pcl.group.project_creation_level == "noone"