🌱 (CLI) Add unit tests for cli alpha generate.go

[mayuka-c]

Updates: #4925

• Improve the coverage by adding UTs for cli alpha generate.go.
• This is the continuation of my other UT PRs to improve coverage :)

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @mayuka-c. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[mayuka-c]

Closing this as I have raised a new PR: #5074
The commit history got messed up while I was debugging something