Add UT for powervs_cluster file

[Karthik-K-N]

What this PR does / why we need it: This PR adds UT for powervs_cluster.go files

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged): Fixes # Partially fixes https://github.com/kubernetes-sigs/cluster-api-provider-ibmcloud/issues/1818

Special notes for your reviewer:

/area provider/ibmcloud

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

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[Karthik-K-N]

@dharaneeshvrd @Amulyam24 Please take a look and let me know your opinion, I tried to add UT for individual functions just to get more coverage and cover all the cases, Though few of the cases will be covered in UT for various Recocile functions. Should this be continued this way or cover multiple function in same UT?

[dharaneeshvrd]

I think we can continue this way, if something broke it will help identify the exact func, if we dependant on the Reconcile test, may need some level of debugging. Also if we only test the main Reconcile func, there maybe chances for minor func to get missed.

[Karthik-K-N]

I think we can continue this way, if something broke it will help identify the exact func, if we dependant on the Reconcile test, may need some level of debugging. Also if we only test the main Reconcile func, there maybe chances for minor func to get missed.

Sure thanks for the feedback, Will continue this way

[Karthik-K-N]

/test pull-cluster-api-provider-ibmcloud-coverage

[Karthik-K-N]

Updated and rebased with main, PR is ready for review again.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Karthik-K-N, mkumatag

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