Upgrade to Django 4.2

[Viicos]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 52.00000% with 12 lines in your changes are missing coverage. Please review.

Project coverage is 54.95%. Comparing base (384d2e7) to head (dd48cc3).

Files	Patch %	Lines
vng_api_common/validators.py	47.05%	9 Missing ⚠️
vng_api_common/authorizations/validators.py	40.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #25      +/-   ##
==========================================
+ Coverage   54.80%   54.95%   +0.15%     
==========================================
  Files          79       79              
  Lines        3642     3632      -10     
  Branches      538      590      +52     
==========================================
  Hits         1996     1996              
+ Misses       1543     1533      -10     
  Partials      103      103              

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[Viicos]

Next steps would be:

• Remove drf-yasg: it seems to be compatible with 4.2 (although only 4.1 is explicitly stated as supported), but is badly maintained and will not work on Python 3.12
• Figure out what to do with iso-639: will also not work with 3.12, not maintained anymore. Alternative: https://github.com/jacksonllee/iso639

[annashamray]

ON + django4.2 - checked, works without errors
OZ + django3.2 - checked, there are some errors with validator
OZ + django4.2 - not checked, because it requires quite some work to update OZ itself and drc-cmis, before it can be tested. But I don't think it should block this PR.

So after minor remarks are addressed, it's good to go