test/e2e/karmadactl_test.go: test apply command

[mohamedawnallah]

Description

In this commit, we add e2e tests for the karmadactl apply command to ensure it handles various scenarios correctly. The tests include:

• Applying configurations without propagating them into member clusters.
• Applying configurations with propagation into specific member clusters.
• Applying configurations and propagating them to all member clusters.
• Verifying that no resources were created during --dry-run mode.
• Ensuring the command returns an error for an invalid flag.
• Ensuring the command returns an error when the specified file does not exist.
• Applying configurations with the --namespace flag to ensure resources are created in the specified namespace.
• Applying configurations with the --force-conflicts flag to ensure conflicts are forcefully resolved during server-side apply.
• Applying configurations using the --kustomize flag to process a kustomization directory.

What type of PR is this?

/kind failing-test

Which issue(s) this PR fixes:

Part of #4544

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 29.82%. Comparing base (6318541) to head (c325eee).
Report is 7 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    #5250      +/-   ##
==========================================
+ Coverage   29.67%   29.82%   +0.15%     
==========================================
  Files         632      632              
  Lines       43936    43936              
==========================================
+ Hits        13037    13106      +69     
+ Misses      29954    29873      -81     
- Partials      945      957      +12     

Flag	Coverage Δ
unittests	29.82% <ø> (+0.15%)	⬆️

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.

[mohamedawnallah]

Trying to close the PR and re-open for flaky test cases e2e test (v1.30.0) to succeed!

[mohamedawnallah]

It seems all test cases passed now :)

[zhzhuang-zju]

/assign

[zhzhuang-zju]

@mohamedawnallah thanks your excellent work, and my opinion is for your consideration only.
PS. sorry for the late, I've been busy with other things lately, but I'll review your other PRs as soon as I can.

[zhzhuang-zju]

thanks~others LGTM

[zhzhuang-zju]

/lgtm
cc @XiShanYongYe-Chang

[XiShanYongYe-Chang]

Thanks a lot~

[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:

• 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