Test clean-up. Clean-up clients created during tests

[kailash-b]

Description

This PR implements test cleanup improvements for the Management API integration tests by ensuring that clients created during test execution are properly tracked for cleanup.

Changes Made

• Tracks newly created clients in tests to be deleted as part of clean-up.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.20%. Comparing base (c24f786) to head (ab6bdd9).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #884   +/-   ##
=======================================
  Coverage   79.20%   79.20%           
=======================================
  Files         457      457           
  Lines        5915     5915           
  Branches      277      277           
=======================================
  Hits         4685     4685           
  Misses       1136     1136           
  Partials       94       94           

Flag	Coverage Δ
authIntTests	30.60% <ø> (ø)
mgmtIntTests	60.79% <ø> (ø)
unittests	8.96% <ø> (ø)

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