docs: Formalize infrastructure management process for `cncfkubeflow` OCI Tenancy

[jaiakash]

Hi, I want to add the documentation for process of requesting, initiating and managing the infra for Kubeflow at cncfkubeflow OCI tenancy.

Objectives

• Establish a formal request procedure: Define the workflow for contributors and mentors to request resources.
• Onboarding for GSoC 2026: Provide clear guidance for Google Summer of Code projects that require dedicated infrastructure for development and testing.
• Support for Niche Use Cases: Enable the provisioning of VMs or clusters for community-wide benefit, allowing for initial testing within the tenancy before migrating to official CNCF infrastructure. (Eg arm support build and publish ARM images for kubeflow pipelines  pipelines#10309 & gsoc: Add End-to-End ARM64 Support & Validation on Kubeflow for GSoC 2026 proposal website#4299)
• Management & Cleanup - Policies for monitoring usage and decommissioning resources once a project or GSoC term ends.