feat: upgrade list_report_downloads api to DRF ( 13th )

[awais786]

Issue

verify via postman

1. Course Role should be set as data_researcher.
2. You need to waffle.flag as instructor.enable_data_download_v2.
3. Try this URL in postman as POST.

expected result
{ "downloads": [ { "name": "edx_cs222_2311_anonymized_ids_2024-08-22-1417.csv", "url": "/media/grades/73b48dc910e9bad3fb08a950770c499e1347501d/edx_cs222_2311_anonymized_ids_2024-08-22-1417.csv", "link": "<a href=\"/media/grades/73b48dc910e9bad3fb08a950770c499e1347501d/edx_cs222_2311_anonymized_ids_2024-08-22-1417.csv\">edx_cs222_2311_anonymized_ids_2024-08-22-1417.csv</a>" }, }

Verify via instructor dashboard

1. select some option from the dropdown and press download report buttton.
2. It will trigger the celery task to generate csv.

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[edx-pipeline-bot]

2U Release Notice: This PR has been deployed to the edX staging environment in preparation for a release to production.

[edx-pipeline-bot]

2U Release Notice: This PR has been deployed to the edX production environment.