Deletion of groups with and without group ID numbers without permission

Test Pre-requisites:

Create Test Data

1. As an admin, create a new course
2. Navigate to Settings -> Course administration -> Users -> Enrolled users
3. Enrol a teacher in the course
4. Navigate to Settings -> Course administration -> Users -> Permissions
5. Remove 'Teacher' from the permission 'moodle/course:changeidnumber'
6. Navigate to Settings -> Course administration -> Users -> Groups
7. Create 4 new groups with those corresponding values:

You will need to click on the 'Show advanced' button to set the Group ID number.

6. Back on the groups page, click on the tab 'Groupings'
7. Create 4 new groupings

Test Steps:

1. Login as the teacher and navigate to Settings -> Course administration -> Users -> Groups
2. Confirm that the button 'Delete selected group' is greyed when selecting 'group-id-2'
3. Select 'group-noid-2', click 'Delete selected group', click yes on confirmation page. Confirm that the group was removed.
4. Open the tab 'Groupings'
5. Confirm that there is no icon to delete 'grouping-id-2'
6. Click the delete icon of 'grouping-noid-2', click yes on confirmation page. Confirm that the group was removed.