[#2969] Create questions with OpenKlant2

[pi-sigma]

Taiga: https://taiga.maykinmedia.nl/project/open-inwoner/task/2969

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.95960% with 8 lines in your changes missing coverage. Please review.

Project coverage is 94.19%. Comparing base (a6d78fa) to head (4352a67).

Files with missing lines	Patch %	Lines
src/open_inwoner/openklant/services.py	71.42%	4 Missing ⚠️
src/open_inwoner/accounts/signals.py	86.66%	2 Missing ⚠️
src/open_inwoner/openklant/admin.py	71.42%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1574      +/-   ##
===========================================
- Coverage    94.20%   94.19%   -0.01%     
===========================================
  Files         1079     1080       +1     
  Lines        39646    39773     +127     
===========================================
+ Hits         37347    37466     +119     
- Misses        2299     2307       +8     

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[swrichards]

Just a question about the anonymous user/ok2 configuration, otherwise just nitpicks.

[swrichards]

Just some minor nitpicks now, all to do with handling the (far-fetched) case in which we add something to the service enum but forget to handle it in all our getters, otherwise LGTM.