fix: remove extra slash when constructing member cluster URL if the apiEndpoint of the cluster object ends with a slash

[spiritNO1]

What type of PR is this?

What this PR does / why we need it:

Which issue(s) this PR fixes:
Fixes #5228

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

karmada-aggregated-apiserver: User can append a "/" at the end when configuring the cluster's apiEndpoint.

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Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 31.16%. Comparing base (19d1146) to head (f5f351b).
Report is 23 commits behind head on master.

Files	Patch %	Lines
pkg/registry/cluster/storage/aggregate.go	66.66%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5432      +/-   ##
==========================================
+ Coverage   31.05%   31.16%   +0.10%     
==========================================
  Files         638      640       +2     
  Lines       44307    44414     +107     
==========================================
+ Hits        13760    13842      +82     
- Misses      29552    29569      +17     
- Partials      995     1003       +8     

Flag	Coverage Δ
unittests	31.16% <66.66%> (+0.10%)	⬆️

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[spiritNO1]

/assign @chaunceyjiang

[XiShanYongYe-Chang]

Hi @spiritNO1, have you tested it yet?

[chaunceyjiang]

Thanks~

This is a great patch! I have already tested it in my local environment. It is working correctly.

 kubectl get  --raw /apis/cluster.karmada.io/v1alpha1/clusters/*/proxy/apis/apps/v1/namespaces/default/deployments/nginx

/lgtm

[chaunceyjiang]

/kind bug

You need to write the release notes in the description of the PR.

[spiritNO1]

Hi @spiritNO1, have you tested it yet?

Yes, modify the cluster.spec.apiEndpoint with / at the end, and not with / at the end.
Original code cannot work with / at the end, after fix it can work.

[spiritNO1]

/kind bug

You need to write the release notes in the description of the PR.

done

[XiShanYongYe-Chang]

done

How about add the component name in the release note:

karmada-aggregated-apiserver: xxx

[XiShanYongYe-Chang]

Thanks a lot
/approve

Hi @spiritNO1 would you like to help cherry-pick this patch to the previous release branch?

I created a tracked issue #5455

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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