Server.Listeners + Upstream V4/V6

Co-Authored-By: brekotis <93345790+brekotis@users.noreply.github.com>

src/proxy/tests/proxy_shared_state_isolation_tests.rs

@@ -59,6 +59,8 @@ fn new_client_harness() -> ClientHarness {
             enabled: true,
             scopes: String::new(),
             selected_scope: String::new(),
+            ipv4: None,
+            ipv6: None,
         }],
         1,
         1,