* feat: New API for discussion topics
Creates a new API for discussion topics that uses auto-crated discussion topic links for the new discussion provider.
* squash!: refresh migration
* Python code cleanup by the cleanup-python-code Jenkins job.
This pull request was generated by the cleanup-python-code Jenkins job, which ran
```
cd lms/djangoapps/dashboard; find . -type f -name '*.py' | while read fname; do sed -i 's/ # lint-amnesty, pylint: disable=super-with-arguments//; s/ # lint-amnesty, pylint: disable=import-error, wrong-import-order//; s/ # lint-amnesty, pylint: disable=wrong-import-order//' "$fname"; done; find . -type f -name '*.py' | while read fname; do pyupgrade --exit-zero-even-if-changed --py3-plus --py36-plus --py38-plus "$fname"; done; isort --recursive .
```
The following packages were installed:
`pyupgrade,isort`
* feedback done
Co-authored-by: Zulqarnain <muhammad.zulqarnain@arbisoft.com>
Fix all deprecation warnings generated by Django REST Framework during the unit tests:
* ``The `base_name` argument is pending deprecation in favor of `basename`.`` (86 occurrences)
* `` `detail_route` is deprecated and will be removed in 3.10 in favor of `action`, which accepts a `detail` bool. Use `@action(detail=True)` instead.`` (18 occurrences)
