test: add CI test for endpoint with already-allocated identity
test: add CI test for endpoint with already-allocated identity

Add a CI test which ensures that policy is correctly computed for endpoints
which have an identity which was created in the key-value store prior to the
creation of said endpoint.

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

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