Merge pull request #54181 from apelisse/update-kube-openapi

Automatic merge from submit-queue (batch tested with PRs 54199, 54181, 54196). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Update openapi to use kube-openapi code

**What this PR does / why we need it**: OpenAPI code has moved to `github.com/kubernetes/kube-openapi`. Let's use that code as a dependency, since now it's duplicated.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #51823

**Special notes for your reviewer**:

**Release note**:
```release-note
NONE
```

No user visible changes. Just code moving around.

Kubernetes-commit: 507790c9c6f50b580b4409b5ac93b10a24570819