test: Add permissions and roles e2e tests

[novakzaballa]

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Changes

Add e2e test for permissions and roles.

Closes #3854

How did you test this code?

We needed the branch test: seed data for permission and roles e2e tests to test it

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3 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
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[github-actions]

Uffizzi Ephemeral Environment deployment-58755

☁️ https://app.uffizzi.com/github.com/Flagsmith/flagsmith/pull/4172

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.39%. Comparing base (cafb663) to head (2266221).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4172   +/-   ##
=======================================
  Coverage   97.39%   97.39%           
=======================================
  Files        1191     1191           
  Lines       41536    41536           
=======================================
  Hits        40454    40454           
  Misses       1082     1082           

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[kyle-ssg]

Unmarking as draft to test e2e