cli: cilium service list -o json returns raw json
cli: cilium service list -o json returns raw json

We previously return the processed, printable, service data. This was
inconsistent with other "-o json" output and
"cilium service get <id> -o json".

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