chore: remove cluster-admin role

[smritidahal653]

Created a cluster role with explicit permissions and removed high privilege role cluster-admin

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.56%. Comparing base (b3460ff) to head (c31e3fc).
Report is 11 commits behind head on master.

❗ Current head c31e3fc differs from pull request most recent head da50857

Please upload reports for the commit da50857 to get more accurate results.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #615      +/-   ##
==========================================
+ Coverage   69.81%   70.56%   +0.75%     
==========================================
  Files          15       15              
  Lines        2597     2079     -518     
==========================================
- Hits         1813     1467     -346     
+ Misses        666      494     -172     
  Partials      118      118              

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