[ACM-12690] Added webhook check for invalid DiscoveredCluster displayName

[dislbenn]

Description

Updated Discovery webhook to check if the DiscoveredCluster displayName is invalid. If the field is identified as invalid, the cluster cannot be automatically imported into the ACM / MCE hub cluster.

Related Issue

https://issues.redhat.com/browse/ACM-12690

Changes Made

Updated Discovery webhook to prevent automatic import for DiscoveredClusters with invalid displayName.

Screenshots (if applicable)

Add screenshots or GIFs that demonstrate the changes visually, if relevant.

Checklist

• I have tested the changes locally and they are functioning as expected.
• I have updated the documentation (if necessary) to reflect the changes.
• I have added/updated relevant unit tests (if applicable).
• I have ensured that my code follows the project's coding standards.
• I have checked for any potential security issues and addressed them.
• I have added necessary comments to the code, especially in complex or unclear sections.
• I have rebased my branch on top of the latest main/master branch.

Additional Notes

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Reviewers

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/cc @cameronmwall @ngraham20

Definition of Done

• Code is reviewed.
• Code is tested.
• Documentation is updated.
• All checks and tests pass.
• Approved by at least one reviewer.
• Merged into the main/master branch.

[dislbenn]

/cherry-pick backplane-2.6

[openshift-cherrypick-robot]

@dislbenn: once the present PR merges, I will cherry-pick it on top of backplane-2.6 in a new PR and assign it to you.

In response to this:

/cherry-pick backplane-2.6

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[sonarqubecloud]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[ngraham20]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dislbenn, ngraham20

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• OWNERS [dislbenn,ngraham20]

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[openshift-cherrypick-robot]

@dislbenn: new pull request created: #293

In response to this:

/cherry-pick backplane-2.6

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.