chore: Upgrading Kubebuilder to V4

[holgerson97]

My motivation for this PR is this discussion: Kubebuilder Discussion #3907
I also want to move the scaffolding into the root directory, is this something that is ok to be done in one PR?

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[skitt]

It’s fine to do these two changes in a single PR (as two separate commits), thanks. But it seems to me the merge is going in the wrong direction: here everything is added in clusterproperty, I would have thought everything would end up in the root directory.

[holgerson97]

It’s fine to do these two changes in a single PR (as two separate commits), thanks. But it seems to me the merge is going in the wrong direction: here everything is added in clusterproperty, I would have thought everything would end up in the root directory.

@skitt I think my question was not straightforward enough, basically it was about the rescaffolding in this PR, I added now the changes in 7c82e36

[qiujian16]

we still need the generated client

[holgerson97]

@skitt sorry for this taking so long, can you rereview?

[qiujian16]

actually we need the generated client, it cannot be deleted. I have another PR that to update the existing one right now...#31

[lauralorenz]

/sig multicluster