Remove too old versions in KIC's version compatibility list

[randmonkey]

Where is the problem?

https://docs.konghq.com/kubernetes-ingress-controller/latest/reference/version-compatibility/

What happened?

The current version compatibility list includes some old versions that have been already out of support:

• KIC 2.6~2.10
• Kong gateway 1.5, 2.0~2.7
• K8s 1.21~1.26
• Istio 1.13~1.17
  Also, the latest versions are put in last rows or columns. This is not easy to find the compatibility status of the latest versions.

What did you expect to happen?

• Remove the versions of products that are already end of support
• Reverse the order of versions in rows/columns to put the latest versions at foremost places

Code of Conduct and Community Expectations

• I agree to follow this project's Code of Conduct
• I agree to abide by the Community Expectations