tests: add CLI test for cilium bpf metrics list command
tests: add CLI test for cilium bpf metrics list command

Signed-off-by: Gilberto Bertin <e45dca12016e9fd4d68d2c7903502c5e1a1f4f1b@isovalent.com>

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