CI: Wait on create/delete in helpers.SampleContainersAction
CI: Wait on create/delete in helpers.SampleContainersAction

We use this utility function in a number of test suites, cleaning up
when they end. We don't wait for the deletes (or creates) to complete
and this may cause a race with later tests. We now enforce a wait when
creating or deleting endpoints.

Signed-off-by: Ray Bejjani <7f525154e857f3d57a641a83dddc584f42addc6a@covalent.io>

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