pkg+test: unify the usage of policyv1alpha1 operators

[mohamedawnallah]

Description

In this commit, we unify the usage of policyv1alpha1 operators, specifically OverriderOpAdd, OverriderOpRemove, and OverriderOpReplace.

What type of PR is this?

/kind cleanup

Additional Context

While testing the override policy (#5495), I identified an opportunity to improve consistency by unifying the operators, leading to this submission.

Does this PR introduce a user-facing change?:

NONE

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 32.34%. Comparing base (32c2ef7) to head (be87fd5).
Report is 4 commits behind head on master.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5508      +/-   ##
==========================================
+ Coverage   31.70%   32.34%   +0.63%     
==========================================
  Files         643      643              
  Lines       44445    44445              
==========================================
+ Hits        14090    14374     +284     
+ Misses      29325    28981     -344     
- Partials     1030     1090      +60     

Flag	Coverage Δ
unittests	32.34% <ø> (+0.63%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[RainbowMango]

/retest
Unrelated test:

ERROR: failed to solve: alpine:3.20.3: failed to resolve source metadata for docker.io/library/alpine:3.20.3: failed to do request: Head "https://registry-1.docker.io/v2/library/alpine/manifests/3.20.3": EOF

[mohamedawnallah]

@RainbowMango all test cases passed now :)

[XiShanYongYe-Chang]

Thanks
/lgtm
/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: XiShanYongYe-Chang

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• pkg/controllers/OWNERS [XiShanYongYe-Chang]
• pkg/util/OWNERS [XiShanYongYe-Chang]
• test/OWNERS [XiShanYongYe-Chang]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment