envoy: Egress intergation tests.
envoy: Egress intergation tests.

Verify that egress proxy policy enforcement works for the same test
cases as ingress. Remote identity is resolved from the host map, for
which a matching CIDR entry is configured.

Signed-off-by: Jarno Rajahalme <0f1ab0ac7dffd9db21aa539af2fd4bb04abc3ad4@covalent.io>

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