Add Django 4.2 in CI in Registrar

[iamsobanjaved]

In order to have support for Django 4.2, we first need to run tests on Django 4.2 in the registrar service. For updating CI, we should run tox and GitHub actions modernizers.

Tox Modernizer: tox_moderniser_django42.py

Github Action Modernizer: github_actions_modernizer_django42.py

Registrar repo: https://github.com/openedx/registrar

A/C

Beta Give feedback

1. Run tests with Django 4.2
2. Fix all test failures with Django 4.2 (if any)
3. After merging, ask the owning squad to add Django 4.2 tests in branch protection rules

[iamsobanjaved]

Blocked on these

• [Django 4.2]fix: swagger_auto_schema applied twice to method openedx-unsupported/registrar#552
• feat!: upgrading django-storages openedx-unsupported/registrar#551

[iamsobanjaved]

Duplicate of openedx/public-engineering#208