[#2424] Automatically check that config docs have been created/updated

[pi-sigma]

• Create management command to check that config docs have been created/updated
• Update CI with command

Depends on #1150, which needs to be merged first

Taiga: #2242

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 94.31818% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 95.17%. Comparing base (475ae94) to head (78e79b1).

Files	Patch %	Lines
src/open_inwoner/configurations/bootstrap/base.py	88.88%	9 Missing ⚠️
src/open_inwoner/conf/app/setup_configuration.py	88.67%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1192      +/-   ##
===========================================
- Coverage    95.18%   95.17%   -0.01%     
===========================================
  Files          956      958       +2     
  Lines        34603    34747     +144     
===========================================
+ Hits         32937    33072     +135     
- Misses        1666     1675       +9     

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[pi-sigma]

Implemented via maykinmedia/django-setup-configuration#9, so this is no longer needed.