Use xds-test-server-5 as the GCE interop server (#28399)

tools/internal_ci/linux/grpc_xds_bazel_python_test_in_docker.sh

@@ -71,7 +71,7 @@ GRPC_VERBOSITY=debug GRPC_TRACE=xds_client,xds_resolver,xds_cluster_manager_lb,c
     --test_case="ping_pong" \
     --project_id=grpc-testing \
     --project_num=830293263384 \
-    --source_image=projects/grpc-testing/global/images/xds-test-server-4 \
+    --source_image=projects/grpc-testing/global/images/xds-test-server-5 \
     --path_to_server_binary=/java_server/grpc-java/interop-testing/build/install/grpc-interop-testing/bin/xds-test-server \
     --gcp_suffix=$(date '+%s') \
     --verbose \

tools/internal_ci/linux/grpc_xds_bazel_test_in_docker.sh

@@ -73,7 +73,7 @@ GRPC_VERBOSITY=debug GRPC_TRACE=xds_client,xds_resolver,xds_cluster_manager_lb,c
     --test_case="ping_pong" \
     --project_id=grpc-testing \
     --project_num=830293263384 \
-    --source_image=projects/grpc-testing/global/images/xds-test-server-4 \
+    --source_image=projects/grpc-testing/global/images/xds-test-server-5 \
     --path_to_server_binary=/java_server/grpc-java/interop-testing/build/install/grpc-interop-testing/bin/xds-test-server \
     --gcp_suffix=$(date '+%s') \
     --verbose \

tools/internal_ci/linux/grpc_xds_php_test_in_docker.sh

@@ -78,7 +78,7 @@ GRPC_VERBOSITY=debug GRPC_TRACE=xds_client,xds_resolver,xds_cluster_manager_lb,c
   --test_case="timeout,fault_injection" \
   --project_id=grpc-testing \
   --project_num=830293263384 \
-  --source_image=projects/grpc-testing/global/images/xds-test-server-4 \
+  --source_image=projects/grpc-testing/global/images/xds-test-server-5 \
   --path_to_server_binary=/java_server/grpc-java/interop-testing/build/install/grpc-interop-testing/bin/xds-test-server \
   --gcp_suffix=$(date '+%s') \
   --verbose \
@@ -92,7 +92,7 @@ GRPC_VERBOSITY=debug GRPC_TRACE=xds_client,xds_resolver,xds_cluster_manager_lb,c
   --test_case="all,path_matching,header_matching" \
   --project_id=grpc-testing \
   --project_num=830293263384 \
-  --source_image=projects/grpc-testing/global/images/xds-test-server-4 \
+  --source_image=projects/grpc-testing/global/images/xds-test-server-5 \
   --path_to_server_binary=/java_server/grpc-java/interop-testing/build/install/grpc-interop-testing/bin/xds-test-server \
   --gcp_suffix=$(date '+%s') \
   --verbose \

tools/internal_ci/linux/grpc_xds_ruby_test_in_docker.sh

@@ -68,7 +68,7 @@ GRPC_VERBOSITY=debug GRPC_TRACE=xds_client,xds_resolver,xds_cluster_manager_lb,c
     --test_case="all,circuit_breaking,timeout,fault_injection" \
     --project_id=grpc-testing \
     --project_num=830293263384 \
-    --source_image=projects/grpc-testing/global/images/xds-test-server-4 \
+    --source_image=projects/grpc-testing/global/images/xds-test-server-5 \
     --path_to_server_binary=/java_server/grpc-java/interop-testing/build/install/grpc-interop-testing/bin/xds-test-server \
     --gcp_suffix=$(date '+%s') \
     --verbose \