operator/pkg: depend on aggregator.Interface instead of *aggregator.Clientset

[mohamedawnallah]

Description

In this commit, we apply the Dependency Inversion Principle by depending on an interface instead of a concrete type. This improves flexibility and testability.

Motivation and Context

While testing the KarmadaResource API service operator package (#5596), I found it difficult to mock *aggregator.Clientset, complicating unit tests. By refactoring to depend on an interface, we improve flexibility and testability, allowing for the integration of a fake aggregator clientset since it implements that interface.

What type of PR is this?

/kind cleanup

Does this PR introduce a user-facing change?:

NONE

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 8.33333% with 11 lines in your changes missing coverage. Please review.

Project coverage is 35.19%. Comparing base (4c8bcd4) to head (6c490dc).
Report is 62 commits behind head on master.

Files with missing lines	Patch %	Lines
...rator/pkg/karmadaresource/apiservice/apiservice.go	0.00%	6 Missing ⚠️
operator/pkg/util/apiclient/idempotency.go	0.00%	2 Missing ⚠️
pkg/karmadactl/cmdinit/karmada/check.go	0.00%	1 Missing ⚠️
pkg/karmadactl/util/apiclient/apiclient.go	0.00%	1 Missing ⚠️
pkg/karmadactl/util/idempotency.go	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5602      +/-   ##
==========================================
+ Coverage   34.14%   35.19%   +1.05%     
==========================================
  Files         643      645       +2     
  Lines       44524    44869     +345     
==========================================
+ Hits        15203    15793     +590     
+ Misses      28165    27846     -319     
- Partials     1156     1230      +74     

Flag	Coverage Δ
unittests	35.19% <8.33%> (+1.05%)	⬆️

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[mohamedawnallah]

Hi @XiShanYongYe-Chang,

Could we get this PR merged sooner? The unit test apiservice PR #5596, which depends on this, has been stale for a while. If anything is needed to move it forward, please let me know.

Thanks! 🙏

[XiShanYongYe-Chang]

Thanks~
/assign

[XiShanYongYe-Chang]

Thanks~
/lgtm
/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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• operator/OWNERS [XiShanYongYe-Chang]
• pkg/karmadactl/OWNERS [XiShanYongYe-Chang]

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