This commit adds OAuth2 support to the problem response report endpoints and moves them to a better location following EdX API standards while keeping compatibility to the old
endpoint locations.
This was done to enable the use of reports functionality by external agents and provide a better separation between backend and frontend.
The following endpoints have been moved:
* List instructor tasks:
New URL: POST /api/instructor/v1/course/{}/tasks
Old URL: POST /courses/{}/instructor/api/list_instructor_tasks
* Download instructor reports:
New URL: POST /api/instructor/v1/course/{}/reports
Old URL: POST /courses/course-v1:edX+DemoX+Demo_Course/instructor/api/list_report_downloads
* Generate problem response reports:
New URL: POST /api/instructor/v1/course/{}/reports/problem_responses
Old URL: POST /courses/course-v1:edX+DemoX+Demo_Course/instructor/api/get_problem_responses
Note: The behaviour of the URLs was not modified.
