test/runtime: add connectivity test after daemon configuration update
test/runtime: add connectivity test after daemon configuration update

Add a test which tests that when a policy is imported, that connectivity
continues to work for endpoints after a configuration update is applied to the
daemon. Previously, as documented in GH-4215, such configuration changes to the
daemon would result in connectivity loss for endpoints. This ensures that such a
regression never happens again.

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

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