This PR focuses on optimizing the detectFeatures function used in the setup phase of connectivity tests. Currently this function has a per-cilium-agent loop and on every iteration of this loop, it performs various feature detection checks. But the majority of those detection checks are cluster-wide and not specific to an agent. This means that the same detection logic that could run a single time instead ends up running unnecessarily once per agent.

This PR moves all those cluster-wide feature detection checks outside of the per agent loop.

Also the ExtractFromVersionedConfigMap function is renamed to ExtractFromCiliumVersion as it is not actually extracting anything from the configmap and there is already the ExtractFromConfigMap function that performs feature extraction from the configmap.

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cilium-cli: Optimized feature detection by running cluster-wide checks once