Istio auth sds e2e (istio#12100)

* use CredentialName for SIMPLE

* cvc

* rootca

* update test.

* update test

* fix format

* update gateway config

* fix test

* fix lint

* fix test

* add comments.

* add nolint

* update cvc

* update

* update

* update

* update

* update

* update

* format

* dep ensure --update istio.io/api

* Revise per comments

* Revise

* lint

* Marshal SDS call credential config using deterministic order

* update

* update

* revise

* add comment

* update

* Update validation

* fix istio_auth_sds_e2e

* fix TestRouteSNIViaEgressGateway/*

Makefile

@@ -795,7 +795,10 @@ generate_e2e_test_yaml: $(HELM) $(HOME)/.helm istio-init.yaml
 		--set global.mtls.enabled=true \
 		--set global.proxy.enableCoreDump=true \
 		--set istio_cni.enabled=${ENABLE_ISTIO_CNI} \
+		--set gateways.istio-egressgateway.enabled=true \
+		--set global.outboundTrafficPolicy.mode=REGISTRY_ONLY \
 		${EXTRA_HELM_SETTINGS} \
+		--values install/kubernetes/helm/istio/values-e2e.yaml \
 		--values install/kubernetes/helm/istio/values-istio-sds-auth.yaml \
 		install/kubernetes/helm/istio >> install/kubernetes/istio-auth-sds.yaml