[Refactor] Use pointer values for fields.

[geetikabatra]

All the fields defined in types.go should be of pointer type, unless it is very much necessary to keep it as is. This would help in better error handling. It is adopted across cluster api wide and should be adopted by CAPV also.

This will for example solve the problem of nil values in int32. the nil and the zero values (by Go standards) have semantic differences. Hence if the field of type int32 is not present, it is not passed as nil and hence cannot be compared.

https://cluster-api.sigs.k8s.io/contributing?highlight=optional#optional-vs-required

Describe the solution you'd like [A clear and concise description of what you want to happen.]

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[srm09]

Do you mind listing out the API types, and we could discuss and tackle them as part of separate PRs?

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/lifecycle stale

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/lifecycle rotten

[k8s-triage-robot]

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/close not-planned

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

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The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

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/close not-planned

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