update get_issued_certificates to DRF

[awais786]

Testing step via postman

1. Use this URL in postman for post

expected result

{
    "certificates": [
        {
            "course_id": "course-v1:edx+cs201+2023",
            "mode": "audit",
            "total_issued_certificate": 1,
            "report_run_date": "September 25, 2024"
        }
    ],
    "queried_features": [
        "course_id",
        "mode",
        "total_issued_certificate",
        "report_run_date"
    ],
    "feature_names": {
        "course_id": "CourseID",
        "mode": "Certificate Type",
        "total_issued_certificate": "Total Certificates Issued",
        "report_run_date": "Date Report Run"
    }
}

You can pass the ?csv=false or ?csv=true to get the csv file.

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Test via dashboard.

1. Go to this page user your course id.
2. select certificate tab.

This works with POST and GET both.