[CHANGE] Migrated to Alliance Auth proxy models for our tests

[ppfeufer]

Description

Changed

• Migrated to Alliance Auth proxy models for our tests

Type of Change:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality not to work as expected)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented on my code, particularly in hard-to-understand areas
• I have checked my code and corrected any misspellings

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (9f57d6b) to head (aca9150).

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #354   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           11        11           
  Lines          345       345           
  Branches        27        27           
=========================================
  Hits           345       345           

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