[WIP] ✨ DON'T REVIEW: POC: KCP in-place update

[sbueringer]

What this PR does / why we need it:

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[sbueringer]

/test pull-cluster-api-e2e-main

[sbueringer]

/test pull-cluster-api-e2e-main

[sbueringer]

/test pull-cluster-api-e2e-main

[sbueringer]

/test pull-cluster-api-e2e-main

[sbueringer]

/close

[k8s-ci-robot]

@sbueringer: Closed this PR.

In response to this:

/close

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