chore: Replace usages of executor_name fixture with user/admin fixture

[zusorio]

Some uses remain where I wasn't sure, plus alerts because those got reworked anyway.

Closes #2159

[sonarqubecloud]

Quality Gate passed

Issues
0 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

[github-actions]

API Changelog 4.17.2.dev26+gf779f8f3

[codecov]

Bundle Report

Bundle size has no change ✅

[github-actions]

This report was generated by comparing f779f8f with c211b6b.
If you would like to check difference, please check here.

ArtifactName: reg

✨✨ That's perfect, there is no visual difference! ✨✨

item	count
pass	464
change	0
new	0
delete	0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.54%. Comparing base (c211b6b) to head (54fdb1c).
Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2205   +/-   ##
=======================================
  Coverage   87.54%   87.54%           
=======================================
  Files         239      239           
  Lines        8198     8198           
  Branches      568      568           
=======================================
  Hits         7177     7177           
  Misses        861      861           
  Partials      160      160           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.