[Daily Business] Upgrade our pipelines to use Kubernetes 1.29

[zhoujing2022]

Description
We are going to upgrade Kyma to support K8s version 1.28. This requires an updated of all existing pipelines and preview-jobs to use 1.29 (respectively 1.30 for preview jobs). (Please complete this task before 20.May.2024)

Tasks

• Prow jobs are based on k8s 1.29 - see example PR
  • kyma-upgrade-gardener-kyma2-minor-versions job should be still using the currently used k8s version and not be updated
  • Existing release jobs should also not be updated to use the new K8s version
• Default version for kubectl is 1.29 (Docu, Prow)
• Configure preview job to verify if Kyma is compatible with k8s1.30 (next k8s version - see example PR)
  • create tickets (and link them) for other teams if the pipeline gets red (ping release-manager and provide him the issue-link)

Previous upgrade: #9807

Relates to kyma-project/kyma#18669