test: Fix flake in ValidateEndpointsAreCorrect
test: Fix flake in ValidateEndpointsAreCorrect

ValidateEndpointsAreCorrect ensures that all Docker containers have a
corresponding Cilium endpoints. The information necessary to match
containers with Cilium endpoints is however only available once the
endpoints are ready (have received labels, identity, and other
information). We therefore need to wait for all endpoints to be ready
before running ValidateEndpointsAreCorrect.

Signed-off-by: Paul Chaignon <a027184a55211cd23e3f3094f1fdc728df5e0500@cilium.io>

tklauser/cilium,cilium/cilium,cilium/cilium,tklauser/cilium,michi-covalent/cilium,cilium/cilium,tklauser/cilium,tklauser/cilium,tklauser/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,michi-covalent/cilium