Draft: Macro UX initial experiences for Kubernetes Agents

What does this MR do and why?

• Based on https://about.gitlab.com/direction/configure/kubernetes_management/#jobs
• Demo project:
  • Latest: https://gitlab.com/dosuken-org/developer-group/my-commerce
  • v1: https://gitlab.com/dosuken-public-group/release-manager-group/my-commerce
• Development Project: https://gitlab.com/shinya.maeda/my-commerce

Related to #347359 (closed)

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.