Feature/remove django choices

[annashamray]

Done:

• convert DjangoChoices into native models.TextChoices
• remove depreciated ObjectTypes constant
• remove description parameters from constants

[codecov-commenter]

Codecov Report

Merging #11 (046b0ff) into main (b8ea21a) will decrease coverage by 0.19%.
The diff coverage is 88.98%.

@@            Coverage Diff             @@
##             main      #11      +/-   ##
==========================================
- Coverage   53.30%   53.12%   -0.19%     
==========================================
  Files          78       78              
  Lines        3611     3603       -8     
  Branches      530      531       +1     
==========================================
- Hits         1925     1914      -11     
- Misses       1588     1592       +4     
+ Partials       98       97       -1     

Files Changed	Coverage Δ
vng_api_common/audittrails/viewsets.py	38.46% <0.00%> (-0.38%)	⬇️
vng_api_common/inspectors/query.py	31.48% <0.00%> (ø)
vng_api_common/middleware.py	59.44% <0.00%> (ø)
vng_api_common/checks.py	61.90% <33.33%> (ø)
vng_api_common/constants.py	90.83% <92.59%> (-3.43%)	⬇️
vng_api_common/serializers.py	60.00% <100.00%> (-0.51%)	⬇️

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