CODEOWNERS: Update Kubernetes owners
CODEOWNERS: Update Kubernetes owners

- examples/crds/ are where generated CRDs are kept.
- pkg/k8s/apis/cilium.io/v2 contains Kubernetes related code especially
  inside `validator`.

Signed-off-by: Chris Tarazi <711c73f64afdce07b7e38039a96d2224209e9a6c@isovalent.com>

tgraf/cilium,tgraf/cilium,tgraf/cilium,tgraf/cilium,tklauser/cilium,cilium-team/cilium,tklauser/cilium,michi-covalent/cilium,tklauser/cilium,cilium/cilium,tklauser/cilium,tklauser/cilium,tgraf/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,cilium-team/cilium,cilium/cilium,michi-covalent/cilium,tgraf/cilium