Fix building localization files.
Fix building localization files.

This removes the now-unsupported `interactive=` argument when calling
`compilemessages`, allowing `build-i18n.py` to work on Django 3.2.

Testing Done:
Successfully built Review Board 5 packages.

Reviewed at https://reviews.reviewboard.org/r/12397/

reviewboard/reviewboard,reviewboard/reviewboard,reviewboard/reviewboard,reviewboard/reviewboard