Remove deprecated APIs from registry operator

[michael-valdron]

Which area/kind this issue is related to?

/area registry

Issue Description

The registry operator has been recently updated to use Kubernetes v1.26 as of writing, with this update we need to ensure that all APIs are using up to date definitions and any that are deprecated (since v1.22 previously in use) are removed.

[michael-valdron]

Might be some overlap with #1106

[michael-valdron]

blocked by #1106

[michael-valdron]

blocked by #1106

no longer blocked

[github-actions]

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