Update feature flag documentation
Update feature flag documentation

I went through the list of feature flags that still default to false and added any missing ones to this list

robinpercy/kops,robinpercy/kops,justinsb/kops,kubernetes/kops,robinpercy/kops,kubernetes/kops,robinpercy/kops,justinsb/kops,justinsb/kops,kubernetes/kops