update list_entrance_exam_instructor_tasks to DRF

[awais786]

list_entrance_exam_instructor_tasks API

How to enable entrance exams for course.

Testing steps:

1. go to this page on instructor page.
2. Adjust a learner's entrance exam results ( pass student id ) and press reset attempts to zero.
3. now at bottom press tasks results Show the status for the rescoring tasks that you submitted for this learner and entrance exam..

---

Postman api
http://local.edly.io:8000/courses/course-v1:edx+cs222+2311/instructor/api/list_entrance_exam_instructor_tasks
Body params
unique_student_identifier as key and student email as value

Expected results

{
    "tasks": [
        {
            "task_type": "reset_problem_attempts",
            "task_input": "{\"entrance_exam_url\": \"block-v1:edx+cs222+2311+type@chapter+block@9b2ef4ddf799482da311e9b10122ec8a\", \"student\": \"admin\"}",
            "task_id": "c71f3e80-1e31-4c29-99ad-a18c4ca42b62",
            "requester": "admin",
            "task_state": "SUCCESS",
            "created": "2024-07-31T11:03:53.649745+00:00",
            "duration_sec": 0,
            "status": "Incomplete",
            "task_message": "Unable to find entrance exam submission to be reset for student 'admin'"
        },
        {
            "task_type": "reset_problem_attempts",
            "task_input": "{\"entrance_exam_url\": \"block-v1:edx+cs222+2311+type@chapter+block@9b2ef4ddf799482da311e9b10122ec8a\", \"student\": \"admin\"}",
            "task_id": "1204f407-5863-4935-bba5-f288078dac43",
            "requester": "admin",
            "task_state": "SUCCESS",
            "created": "2024-07-31T10:55:30.726424+00:00",
            "duration_sec": 0,
            "status": "Incomplete",
            "task_message": "Unable to find entrance exam submission to be reset for student 'admin'"
        }
    ]
}