Fix logic for getting total votes per electrol race

[JohnMwashuma]

Task checklist

---

• Fix logic for getting total votes per electrol race
  • Only use result model for results and filter by form state = archived
• Fix searching ballots list
• Add test for ballot list data view

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.94%. Comparing base (14af9ff) to head (9661b44).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #436      +/-   ##
==========================================
+ Coverage   80.81%   80.94%   +0.13%     
==========================================
  Files         145      145              
  Lines        9439     9436       -3     
==========================================
+ Hits         7628     7638      +10     
+ Misses       1811     1798      -13     

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