feat(eks): support Kubernetes 1.34

[harryfrzz]

Issue # (if applicable)

Closes #35717.

Reason for this change

Amazon EKS and EKS Distro now support Kubernetes 1.34. Adding v1.34 to the CDK EKS module keeps CDK users aligned with the latest managed Kubernetes version and avoids manual workarounds.

Description of changes

• Add KubernetesVersion.V1_34 to EKS supported versions.
• Update kubectl asset layer to v1.34 for compatibility with cluster operations.
• Refresh integration test snapshots reflecting kubectl v1.34 outputs.

Describe any new or updated permissions being added

Description of how you validated changes

• Unit tests: Extended version to include v1.34 and ran existing EKS tests.
• Integration: Updated snapshots for kubectl v1.34

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[aws-cdk-automation]

(This review is outdated)

✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

[phuhung273]

The idea is ok, we can start updating a few things first:

• Update PR title as instructed in https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md#step-4-pull-request
• For this PR and next few other PRs, I would recommend to fill all PR description to:
  • help reviewers understand what problem you're solving
  • show how you tested the change
  • Among them, only permission section is optional.
• Seems like you're using your own linter to format cluster.ts. Please don't do it as the project already has its own linter. Ideally, cluster.ts should only has the new version added.

[aws-cdk-automation]

(This review is outdated)

✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.