chore: support upgrading to django 5.2

[pomegranited]

TL;DR -

Support upgrading to django 5.2 while maintaining django 4.2 compatibility.

Closes: #2290

What changed?

• Ran django-upgrade and updated migration
• Added django52 target to tox & CI
• Added Django 5.2 to setup docs
• Fixed quality

Developer Checklist

• Reviewed the release process
• Translations and JS/SASS compiled
• Bumped version number in openassessment/__init__.py and package.json

Testing Instructions

Code review + green CI should be sufficient to test this change.

Reviewer Checklist

Collectively, these should be completed by reviewers of this PR:

• I've done a visual code review
• I've tested the new functionality

FYI: @openedx/content-aurora

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.29%. Comparing base (df4ed0c) to head (2781d4f).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2294      +/-   ##
==========================================
- Coverage   95.29%   95.29%   -0.01%     
==========================================
  Files         195      195              
  Lines       21626    21625       -1     
  Branches     1502     1502              
==========================================
- Hits        20608    20607       -1     
  Misses        771      771              
  Partials      247      247              

Flag	Coverage Δ
unittests	95.29% <100.00%> (-0.01%)	⬇️

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[pomegranited]

Hiya @openedx/committers-edx-ora2 -- anyone available to review this?

[UsamaSadiq]

Changes look good to be merged.