Remove nullable hack when API version upgrades

[mateusoliveira43]

As described in #1261 (comment) OADP should not add nullable keys to CRDs' YAML files

Solution would be

• remove hack from Makefile (seems the right one, as motivation was another tool that uses OADP needing that), as tried in feat: Nullable logic in code #1261
• transform necessary fields in pointers, so they can be nil in Go (and null in YAML) (also removing hack)

[openshift-bot]

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/lifecycle stale

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/lifecycle rotten
/remove-lifecycle stale

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/close

[openshift-ci]

@openshift-bot: Closing this issue.

In response to this:

Rotten issues close after 30d of inactivity.

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/close

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