feat: reapply forum v2 changes

[regisb]

Description

Restore the following PR: #35671
Include the following feature: #35995

Supporting information

See discussion here: openedx/forum#137 (comment)
FYI @ormsbee

[openedx-webhooks]

Thanks for the pull request, @regisb!

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[regisb]

FYI CI is broken, here is the fix: #36003

EDIT: CI was not broken, it's just that I was compiling requirements with python 3.11.1, and I should have used 3.11.10. The issue comes from that line in redis-py: https://github.com/redis/redis-py/blob/8f2276e14d98b20cd9fc7b4a9e4e084fe9c74609/setup.py#L38

[regisb]

Let's wait until we've merged openedx/forum#139 Then we can bump forum to 0.1.5 here.

EDIT: done: https://pypi.org/project/openedx-forum/ This should be ready to merge. FYI @ormsbee