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Summary
Adds section for KIC 2.4 and updates shared metadata.
Reason
https://github.com/Kong/kubernetes-ingress-controller/releases/tag/v2.4.0
Omits most Gateway updates for now. Added #4026 for a Kubernetes Team member to add more detail separately from the initial update.
I have left the compatibility table in its existing format after adding 2.4, with the single source version only including a subset of versions. The listed versions now extend through 2.0, and as only 2.3+ use the single source page, this should be fine until it can converted into a format that works better with single source. I've requested this from the Docs team in #4028
Testing
Reviewed:
https://deploy-preview-4029--kongdocs.netlify.app/kubernetes-ingress-controller/latest/references/cli-arguments/
https://deploy-preview-4029--kongdocs.netlify.app/kubernetes-ingress-controller/latest/guides/using-gateway-api/#alpha-limitations
https://deploy-preview-4029--kongdocs.netlify.app/kubernetes-ingress-controller/latest/references/version-compatibility/