test/runtime: cleanup RuntimeValidatedChaos test
test/runtime: cleanup RuntimeValidatedChaos test

Change test to use new Ginkgo constructs (`BeforeAll`, `AfterAll`).

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

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