Added member/admin info on groups in dev.list-test-users

[davidwaroquiers]

Added info about membership vs admin in groups for each test user, e.g.

Sami Lamy (sami_lamy@datalab.test)
Role: user
Status: active
Groups: Group A (member, admin)
Login: SOMEIPADRESS?token=SOMETOKEN

Jane Doe (jane_doe@datalab.test)
Role: user
Status: active
Groups: Group A (admin)
Login: SOMEIPADRESS?token=SOMETOKEN

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.48%. Comparing base (ddb057c) to head (fb8f76b).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2199   +/-   ##
=======================================
  Coverage   82.48%   82.48%           
=======================================
  Files          91       91           
  Lines        8782     8782           
=======================================
  Hits         7244     7244           
  Misses       1538     1538           

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