dubbo-xds not support WeightedCluster

### Environment
* Dubbo version: 3.2.0
* Operating System version: xxx
* Java version: 1.8

### Steps to reproduce this issue
1）use dubbo-samples/3-extensions/registry/dubbo-samples-xds
2）kubectl label pods -n dubbo-demo {podName1} version=v1 && kubectl label pods -n dubbo-demo {podName2} version=v2
3）kubectl apply -f VirtualService.yaml
```yaml
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: dubbo-samples-xds-provider
namespace: dubbo-demo
spec:
hosts:
- dubbo-samples-xds-provider.dubbo-demo.svc.cluster.local
http:
- match:
- port: 50051
route:
- destination:
host: dubbo-samples-xds-provider.dubbo-demo.svc.cluster.local
subset: v1
port:
number: 50051
weight: 50
- destination:
host: dubbo-samples-xds-provider.dubbo-demo.svc.cluster.local
subset: v2
port:
number: 50051
weight: 50

---
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: dubbo-samples-xds-provider
namespace: dubbo-demo
spec:
host: dubbo-samples-xds-provider.dubbo-demo.svc.cluster.local
trafficPolicy:
loadBalancer:
simple: ROUND_ROBIN
subsets:
- name: v1
labels:
version: v1
- name: v2
labels:
version: v2
```
### Expected Behavior
consumer can find 2 invokers.

### Actual Behavior
no invokers found.
```
May 31, 2023 5:47:26 AM org.apache.dubbo.rpc.cluster.directory.AbstractDirectory warn
WARNING: [DUBBO] No provider available after connectivity filter for the service org.apache.dubbo.samples.api.GreetingService:1.0.0 All validInvokers' size: 0 All routed invokers' size: 0 All invokers' size: 0 from registry istiod.istio-system.svc:15012 on the consumer 10.1.3.76 using the dubbo version 3.2.0., dubbo version: 3.2.0, current host: 10.1.3.76, error code: 2-2. This may be caused by provider server or registry center crashed, go to https://dubbo.apache.org/faq/2/2 to find instructions.
org.apache.dubbo.rpc.RpcException: Failed to invoke the method sayHello in the service org.apache.dubbo.samples.api.GreetingService. No provider available for the service org.apache.dubbo.samples.api.GreetingService:1.0.0 from registry istiod.istio-system.svc:15012 on the consumer 10.1.3.76 using the dubbo version 3.2.0. Please check if the providers have been started and registered.
at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.checkInvokers(AbstractClusterInvoker.java:367)
at org.apache.dubbo.rpc.cluster.support.FailoverClusterInvoker.doInvoke(FailoverClusterInvoker.java:60)
at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:341)
at org.apache.dubbo.rpc.cluster.router.RouterSnapshotFilter.invoke(RouterSnapshotFilter.java:46)
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:331)
at org.apache.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:101)
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:331)
at org.apache.dubbo.rpc.cluster.filter.support.MetricsClusterFilter.invoke(MetricsClusterFilter.java:51)
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:331)
at org.apache.dubbo.rpc.protocol.dubbo.filter.FutureFilter.invoke(FutureFilter.java:52)
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:331)
at org.apache.dubbo.rpc.cluster.filter.support.ObservationSenderFilter.invoke(ObservationSenderFilter.java:61)
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:331)
at org.apache.dubbo.spring.security.filter.ContextHolderParametersSelectedTransferFilter.invoke(ContextHolderParametersSelectedTransferFilter.java:41)
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:331)
at org.apache.dubbo.rpc.cluster.filter.support.ConsumerClassLoaderFilter.invoke(ConsumerClassLoaderFilter.java:40)
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:331)
at org.apache.dubbo.rpc.cluster.filter.support.ConsumerContextFilter.invoke(ConsumerContextFilter.java:118)
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:331)
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CallbackRegistrationInvoker.invoke(FilterChainBuilder.java:194)
at org.apache.dubbo.rpc.cluster.support.wrapper.AbstractCluster$ClusterFilterInvoker.invoke(AbstractCluster.java:91)
at org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:103)
at org.apache.dubbo.rpc.cluster.support.wrapper.ScopeClusterInvoker.invoke(ScopeClusterInvoker.java:131)
at org.apache.dubbo.registry.client.migration.MigrationInvoker.invoke(MigrationInvoker.java:284)
at org.apache.dubbo.rpc.proxy.InvocationUtil.invoke(InvocationUtil.java:57)
at org.apache.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:75)
at org.apache.dubbo.samples.api.GreetingServiceDubboProxy0.sayHello(GreetingServiceDubboProxy0.java)
at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy27.sayHello(Unknown Source)
at org.apache.dubbo.samples.action.GreetingServiceConsumer.doSayHello(GreetingServiceConsumer.java:34)
at org.apache.dubbo.samples.ConsumerBootstrap.main(ConsumerBootstrap.java:38)
May 31, 2023 5:47:26 AM org.apache.dubbo.rpc.cluster.SingleRouterChain warn
WARNING: [DUBBO] No provider available after route for the service org.apache.dubbo.samples.api.GreetingService:1.0.0 from registry 10.1.3.76 on the consumer 10.1.3.76 using the dubbo version 3.2.0. Router snapshot is below:
[ Parent (Input: 0) (Current Node Output: 0) (Chain Node Output: 0) ] Input: Empty -> Chain Node Output: Empty
[ MockInvokersSelector (Input: 0) (Current Node Output: 0) (Chain Node Output: 0) Router message: Empty invokers. Directly return. ] Current Node Output: Empty, dubbo version: 3.2.0, current host: 10.1.3.76, error code: 2-2. This may be caused by No provider available after route for the service, go to https://dubbo.apache.org/faq/2/2 to find instructions.
May 31, 2023 5:47:26 AM org.apache.dubbo.rpc.cluster.directory.AbstractDirectory warn
WARNING: [DUBBO] No provider available after connectivity filter for the service org.apache.dubbo.samples.api.GreetingService:1.0.0 All validInvokers' size: 0 All routed invokers' size: 0 All invokers' size: 0 from registry istiod.istio-system.svc:15012 on the consumer 10.1.3.76 using the dubbo version 3.2.0., dubbo version: 3.2.0, current host: 10.1.3.76, error code: 2-2. This may be caused by provider server or registry center crashed, go to https://dubbo.apache.org/faq/2/2 to find instructions.
```

Start with dubbo-samples/3-extensions/registry/dubbo-samples-xds and the supplied VirtualService.yaml, then trace how the xDS configuration is consumed. Reproduce the Kubernetes setup with two labeled provider pods and verify that the consumer discovers both invokers for the weighted routes.

Written by the indexing model from the issue text.