[labxchange-xblocks]: Add Support for Django 4.2

[github-actions[bot]]

Description

If latest PyPI release does not have Django 4.2 support, then

• [ ] Verify if latest master/main branch has support for Django 4.2
• [ ] Create issue in the upstream repo for Django 4.2 upgrade if no issue exists already.
• [ ] Create pull request in upstream repo for Django 4.2 support if no pull request exists already.
• [ ] Fork the repo, Add test configurations for Django 4.0, 4.1 and 4.2 in CI
• [ ] Run available django-code-mods to fix the failing tests
• [ ] Fix any remaining Django deprecation warnings or test failures in all the test configurations.
• [ ] Update the Trove classifiers in any setup.py, setup.cfg, or pyproject.toml files
• [ ] Update status in the Dependency Sheet if the package has support for Django 4.2
• [ ] Update the repo support field in the Dependency Upgrade Sheet once a new version with support has been released.