bump k8s-openapi feature to v1_29 and kind nodes to v1.29.7

[alex-hunt-materialize]

Bumps k8s-openapi feature to v1_29 and kind nodes to v1.29.7.

Motivation

Update to match our production clusters.

Tips for reviewer

Checklist

• This PR has adequate test coverage / QA involvement has been duly considered. (trigger-ci for additional test/nightly runs)
• This PR has an associated up-to-date design doc, is a design doc (template), or is sufficiently small to not require a design.
• If this PR evolves an existing $T ⇔ Proto$T mapping (possibly in a backwards-incompatible way), then it is tagged with a T-proto label.
• If this PR will require changes to cloud orchestration or tests, there is a companion cloud PR to account for those changes that is tagged with the release-blocker label (example).
  Not a release blocker, but we will also follow up with bumping this in cloud.
• If this PR includes major user-facing behavior changes, I have pinged the relevant PM to schedule a changelog post.
  No user-facing behavior changes.