pkg/k8s: replace init with specific functions
pkg/k8s: replace init with specific functions

Having a init function to initialize all structures does not initialize
the different fields of 'CNPCRV' in case this variable is accessed
outside the 'v2/client' package. Replacing the 'init' function with
dedicated functions that initialize those fields allows 'CNPCRV' to have
the fields rightfully initialized.

Signed-off-by: André Martins <bc9800b9d52a24cce72a73dd528afed53f10e5fc@cilium.io>

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