fix test that was failing after #6013 (#6026)

agent/proxycfg/manager_test.go

@@ -106,6 +106,7 @@ func TestManager_BasicLifecycle(t *testing.T) {
 	// We should see the initial config delivered but not until after the
 	// coalesce timeout
 	expectSnap := &ConfigSnapshot{
+		Kind:    structs.ServiceKindConnectProxy,
 		ProxyID: webProxy.ID,
 		Address: webProxy.Address,
 		Port:    webProxy.Port,

agent/proxycfg/testing.go

@@ -149,6 +149,7 @@ func TestUpstreamNodes(t testing.T) structs.CheckServiceNodes {
 func TestConfigSnapshot(t testing.T) *ConfigSnapshot {
 	roots, leaf := TestCerts(t)
 	return &ConfigSnapshot{
+		Kind:    structs.ServiceKindConnectProxy,
 		ProxyID: "web-sidecar-proxy",
 		Address: "0.0.0.0",
 		Port:    9999,