tests: deprecate 13-fd-open.sh
tests: deprecate 13-fd-open.sh

Corresponding Ginkgo test has already been marked as validated.

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

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