New course format level setting to enable/disable course indentation in 4.0 and 4.1 (backport of MDL-76991)

Main feature covered by behats. Test for both Topics and Weeks format courses. UI changes - Manual testing As admin create a new site. Go to Site administration > Plugins > Course format > Topics format or Weeks format depending on the format you are testing.  Confirm the 'Use indentation' setting value is Yes by default. Create a course using the format you are testing with at least 2 activities. Open action menu for first activity and Move Right. Confirm the first activity has a bigger margin on the left and has no border anymore. Go to Site administration > Plugins > Course format > Topics format or Weeks format depending on the format you are testing  Disable 'Use indentation' setting and Save changes. Go to the course. Confirm the first activity has a border and the same left margin as the rest of the activities. Upgrading from 3.11 - Manual testing Create a new 3.11 instance. Upgrade to this patch. Go to Site administration > Plugins > Course format > Topics format or Weeks format depending on the format you are testing  Confirm the 'Use indentation' setting value is Yes. Upgrading from 4.0 - Manual testing Create a new 4.0 instance. Upgrade to this patch. Go to Site administration > Plugins > Course format > Topics format or Weeks format depending on the format you are testing  Confirm the 'Use indentation' setting value is No. Web services for mobile As an admin create a course using the format you are testing (remember the COURSE_ID) Enable "Enable web services for mobile devices": Site administration ► General ► Advanced features Create a Token for any user on the site Click on Site administration ► Web services ► Manage tokens Next, you can do a CURL REST call simulating a WS client with the user token. You need to replace the $wstoken and the MOODLE_URL of your moodle instance curl 'MOODLE_URL/webservice/rest/server.php?moodlewsrestformat=json' --data 'wsfunction=core_course_get_courses_by_field&field=id&value=COURSE_ID&wstoken=$wstoken' | python -m json.tool Confirm that you see an entry for the " indentation " setting with the correct value (1 if enabled, 0/empty otherwise)