feat: support DubboService use default version.

Author: fishtailfu

dubbo-plugins/dubbo-registry-polaris/src/main/java/com/tencent/polaris/dubbo/registry/PolarisServiceDiscovery.java

@@ -121,7 +121,7 @@ public List<ServiceInstance> getInstances(String serviceName) throws NullPointer
                             instance.getHost(), instance.getPort(),
                             ScopeModelUtil.getApplicationModel(registryURL.getScopeModel()));
             serviceInstance.setMetadata(instance.getMetadata());
-            serviceInstance.setEnabled(!instance.isIsolated()&&instance.isHealthy());
+            serviceInstance.setEnabled(!instance.isIsolated());
             serviceInstance.setHealthy(instance.isHealthy());
             ret.add(serviceInstance);
         }
@@ -206,7 +206,7 @@ public void onEvent(ServiceChangeEvent event) {
                                 instance.getHost(), instance.getPort(),
                                 ScopeModelUtil.getApplicationModel(registryURL.getScopeModel()));
                 serviceInstance.setMetadata(instance.getMetadata());
-                serviceInstance.setEnabled(!instance.isIsolated()&&instance.isHealthy());
+                serviceInstance.setEnabled(!instance.isIsolated());
                 serviceInstance.setHealthy(instance.isHealthy());
                 serviceInstances.add(serviceInstance);
             }