feat: Update management command for user deferrals to include courses with closed enrollments

[aliraza-abbasi]

Pre-Flight checklist

• Screenshots and design review for any changes that affect layout or styling
  • Desktop screenshots
  • Mobile width screenshots
• Migrations
  • Migration is backward-compatible with the current production code
• Testing
  • Code is tested
  • Changes have been manually tested
• Settings
  • New settings are documented and present in app.json
  • New settings have reasonable development defaults, if applicable

What are the relevant tickets?

#2631

What's this PR do?

A site admin can run the defer_enrollment management command to transfer a user to a course run even after the enrollment period ends

How should this be manually tested?

• edX and xpro should be working on the local machine
• Try to enroll a user in an enrollment-expired course run using the defer_enrollment command using -f argument
• Validate the user is enrolled in the given course run on xpro and edX on your localhost

[arslanashraf7]

Just code reviewed, Testing it now.

[arslanashraf7]

👍 Just one last piece of comment, Feel free to merge after that.

[arslanashraf7]

@aliraza-abbasi One more comment before you merge this, Did you upgrade the requirements with pip-compile?
I just noticed that pip-compile generates a different output than this PR, Please fix that before you merge the PR.