feat: upgrading students_update_enrollment api to DRF

[hunzlahmalik]

Copied branch from

• feat: upgrading students_update_enrollment api to DRF #37010

Issue

• update students_update_enrollment to DRF #37070

Testing

• Go to URL
• Enter emails
• Try to Enroll and Unenroll students

Enroll

Unenroll

Different Options

[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.

[edx-pipeline-bot]

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

[edx-pipeline-bot]

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

[jristau1984]

Were validations done around bulk enrollment and unenrollment, and ensuring that Aspects gets accurate enrollment data? This is really really important code, and I dont want any regressions if they can be avoided...

[edx-pipeline-bot]

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

[edx-pipeline-bot]

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

[hunzlahmalik]

@jristau1984 Just to clarify...

The changes in the bulk enroll API only modify how it internally calls students_update_enrollment.
There were no changes to the input or response structure of students_update_enrollment itself.
The happy case for students_update_enrollment continues to be covered via the LMS frontend.
The happy case for bulk enrollment is verified through API test, and relevant screenshots have been attached in the PR description for reference.