Comparing admission controller: Gatekeeper vs Kyverno

We recently introduced Gatekeeper as a Magnum add-on due to its simplicity and ease of implementation. Additionally, we curated default policies to enforce basic security practices.

However, we are also utilizing Kyverno in the ML cluster.

This issue aims to compare the two controllers, Gatekeeper and Kyverno, and evaluate which one aligns best with our specific use case.