Fix: use prereq styling for KIC and KGO

[lena-larionova]

Description

We've gotten multiple reports from users that they can't tell that the KIC and KGO prereq notes are supposed to be clickable & expandable. Changing these notes to use the styling that we use for the plugins.

Had to shorten the prereqs to be more concise, but they still look a bit weird. This styling is really not meant for full sentences. At the same time, I don't want to put anymore time into this, as this is temporary anyway.

https://konghq.atlassian.net/browse/DOCU-4124

Testing instructions

Preview links for example pages:
https://deploy-preview-8180--kongdocs.netlify.app/kubernetes-ingress-controller/latest/guides/services/http/
https://deploy-preview-8180--kongdocs.netlify.app/gateway-operator/latest/guides/plugin-distribution/

Checklist

• Review label added
• Conditional version tags added, if applicable.

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