Added unit tests for the CustomizedInterpreter

[anujagrawal699]

Description:
This PR adds comprehensive unit tests for the customized webhook interpreter. These tests verify the core functionality of webhook interpretation operations including replica retrieval, dependencies handling, patch operations and webhook enabling.

Additions:

1. pkg/resourceinterpreter/customized/webhook/customized_test.go

Test Coverage:

1. pkg/resourceinterpreter/customized/webhook/customized.go : 0% to 65%

What type of PR is this?
/kind feature

Which issue(s) this PR fixes:
Fixes a part of #5470

Does this PR introduce a user-facing change?:

NONE

[anujagrawal699]

Hi @mohamedawnallah , found some flaky tests.

[mohamedawnallah]

Hi @anujagrawal699, Thanks for pointing this out! I've already submitted a PR for this (#5833).

[zhzhuang-zju]

/retest
/assign

[zhzhuang-zju]

@anujagrawal699 thanks for your work! I've noticed that most of the functions only cover the scenarios of 'hook not synced' and 'no matching hooks.' However, it's challenging to construct successful scenarios, and the newly added tests have retained the extensibility for related scenarios. Therefore, I believe it is acceptable to merge them in.

/lgtm
cc @XiShanYongYe-Chang

[anujagrawal699]

@anujagrawal699 thanks for your work! I've noticed that most of the functions only cover the scenarios of 'hook not synced' and 'no matching hooks.' However, it's challenging to construct successful scenarios, and the newly added tests have retained the extensibility for related scenarios. Therefore, I believe it is acceptable to merge them in.

/lgtm cc @XiShanYongYe-Chang

Thanks @zhzhuang-zju , the successful interpretation scenarios are hard to test and will require complex mocking and thus we should move ahead with this.

[XiShanYongYe-Chang]

Thanks~
/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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