Fix performance issue in large scale envs

[fxiang1]

https://issues.redhat.com/browse/ACM-24032

• Remove Owns function call as this was caching too many ManifestWork events

Now the memory usage is

Probably due to the ManageClusterAddon watch that was added. There is ~21391 ManageClusterAddons on this cluster.

[openshift-ci]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.09%. Comparing base (8be7731) to head (f29bbbc).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #69      +/-   ##
==========================================
- Coverage   66.14%   66.09%   -0.05%     
==========================================
  Files           2        2              
  Lines         700      699       -1     
==========================================
- Hits          463      462       -1     
  Misses        215      215              
  Partials       22       22              

Flag	Coverage Δ
unit	66.09% <ø> (-0.05%)	⬇️

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[xiangjingli]

/lgtm

[fxiang1]

/hold

[fxiang1]

/unhold