test/helpers: remove unnecessary logs for creating / deleting Docker containers
test/helpers: remove unnecessary logs for creating / deleting Docker containers

Now that in `test/helpers/node.go:Exec` we log what command we are running, such
log messages in the command wrapper functions themselves are unnecessary.

Signed-off by: Ian Vernon <ian@cilium.io>

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