Chore: Remove Endpoints ownerRef workaround for fixed k8s issue #28483

[Mangaal]

What does this PR do?

This PR removes the special handling logic for Kubernetes Endpoints resources that was added as a workaround for an upstream bug.

The code responsible for adding a Service as an owner reference to Endpoints with no existing owners is now deleted.

Why is this change being made?

The original issue, tracked in kubernetes/kubernetes#28483, has been fixed in recent versions of Kubernetes.

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 53.58%. Comparing base (8849c3f) to head (e9230a0). Report is 52 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #733      +/-   ##
==========================================
- Coverage   54.26%   53.58%   -0.69%     
==========================================
  Files          64       64              
  Lines        6164     6508     +344     
==========================================
+ Hits         3345     3487     +142     
- Misses       2549     2745     +196     
- Partials      270      276       +6     

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