devel/py-dj52-django-rq: Update to 3.2.1

• Remove test suite and relevant parts of it because the required files are no longer distributed in the sdist tarballs.

Changelog since 3.0.1:

https://github.com/rq/django-rq/blob/v3.2.1/CHANGELOG.md

PR: 291367
Approved by: sunpoet (maintainer)