operator e2e: add pdb e2e test

[zhzhuang-zju]

What type of PR is this? /kind cleanup

What this PR does / why we need it: operator e2e: add pdb e2e test

Which issue(s) this PR fixes:

Part of #6282

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[gemini-code-assist[bot]]

Summary of Changes

Hello @zhzhuang-zju, I'm Gemini Code Assist[^1]! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the testing coverage for the Karmada operator by adding new end-to-end tests focused on PodDisruptionBudget (PDB) configurations. The tests ensure that the operator correctly handles PDB settings for its components, validating both invalid configurations and the proper lifecycle management (creation, update, and deletion) of PDBs when specified in the Karmada instance's common settings. This work contributes to the overall robustness and reliability of PDB management within Karmada deployments.

Highlights

• New E2E Test Suite: Introduced a new end-to-end test suite specifically for PodDisruptionBudget (PDB) configuration within the Karmada operator.
• PDB Configuration Validation: Added validation tests to ensure that Karmada deployments fail with invalid PDB configurations, such as when both minAvailable and maxUnavailable are empty or both are set simultaneously (as they are mutually exclusive).
• PDB Lifecycle Management: Implemented functionality tests to verify the correct creation, update, and deletion of PDBs for the KarmadaControllerManager component based on the PodDisruptionBudgetConfig specified in the Karmada instance's common settings.

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[zhzhuang-zju]

cc @baiyutang @jabellard @RainbowMango

[codecov-commenter]

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Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 46.62%. Comparing base (90b8be2) to head (c691fb9). :warning: Report is 6 commits behind head on master. :exclamation: Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7010      +/-   ##
==========================================
- Coverage   46.64%   46.62%   -0.03%     
==========================================
  Files         699      699              
  Lines       48163    48184      +21     
==========================================
- Hits        22468    22464       -4     
- Misses      24000    24025      +25     
  Partials     1695     1695              

Flag	Coverage Δ
unittests	46.62% <ø> (-0.03%)	:arrow_down:

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[jabellard]

/assign

[jabellard]

Thanks.

/lgtm

/cc @RainbowMango for another look.

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: RainbowMango

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• ~~test/OWNERS~~ [RainbowMango]

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