update get_anon_ids api to DRF

[awais786]

Step to verify via postman

1. Send post reques to this URL

expected result
{ "status": "The Anonymized User IDs report is being created. To view the status of the report, see Pending Tasks below." }

On completion the task csv will appear in instructor dashboard.

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Step to verify via instructor dashboard

1. go to this page
2. Press the button Get Student Anonymized IDs CSV. It will trigger the celery task.

expected result
csv file will appear on completing the task.

Sample file.
edx_cs222_2311_anonymized_ids_2024-08-22-1412.csv