[DPE-7302] Remove user from database

[dragomirp]

Helper to remove user's connect privileges and DB specific roles.

Checklist

• I have added or updated any relevant documentation.
• I have cleaned any remaining cloud resources from my accounts.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.65%. Comparing base (a18dd5f) to head (fda8515).
⚠️ Report is 1 commits behind head on 16/edge.

❌ Your project status has failed because the head coverage (49.65%) is below the target coverage (70.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##           16/edge      #31      +/-   ##
===========================================
+ Coverage    48.99%   49.65%   +0.65%     
===========================================
  Files            4        4              
  Lines          849      860      +11     
  Branches        98       99       +1     
===========================================
+ Hits           416      427      +11     
  Misses         415      415              
  Partials        18       18              

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