Change categories to correlate with mitre attack matrix

[danielsagi]

What would you like to be added

Change categories for vulnerabilities, and add a corresponding field for MITRE correlation. Update kube-hunter's KB with related info

Match this as close as possible: https://www.microsoft.com/security/blog/2021/03/23/secure-containerized-environments-with-updated-threat-matrix-for-kubernetes/

Why is this needed

When we started kube-hunter, there were no general standard for kubernetes attack scenarios. after kube-hunter went public a standard was coming out (that includes our findings, for example the DNS spoofing technique)

We can now switch to try and cover this.