test/helpers: add WaitEndpointsDeleted function
test/helpers: add WaitEndpointsDeleted function

This waits until all endpoints except for cilium-health are deleted.

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

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