Fix censor comment causing negative discussion count

[koutst]

• We are double counting deletions. When a user is flagged as spam we delete all the comments they've made. If those comments are children of the other comments we were double decrementing the discussion count on deletion.

[codecov]

Codecov Report

Attention: Patch coverage is 92.30769% with 1 line in your changes missing coverage. Please review.

Project coverage is 65.78%. Comparing base (a50a3fc) to head (d698311).
Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
src/researchhub_comment/views/rh_comment_view.py	92.30%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2061      +/-   ##
==========================================
+ Coverage   65.69%   65.78%   +0.08%     
==========================================
  Files         421      421              
  Lines       23810    23819       +9     
==========================================
+ Hits        15643    15670      +27     
+ Misses       8167     8149      -18     

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[sonarqubecloud]

Quality Gate passed

Issues
5 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud