- [x] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
- [x] I have checked the [FAQ](https://github.com/apache/dubbo/blob/master/FAQ.md) of this repository and believe that this is not a duplicate.

### Environment

* Dubbo version: 3.0.3

### Steps to reproduce this issue

1. 启动 provider `-Ddubbo.application.register-mode=instance`
2. 启动 consumer `dubbo.application.service-discovery.migration=FORCE_APPLICATION`
3. 使用 `dubbo admin` 创建 mesh 路由
4. `org.apache.dubbo.registry.client.InstanceAddressURL#getParameters` 不能获取真正的 url 参数，导致路由规则匹配失败
![image](https://user-images.githubusercontent.com/43994656/134940925-96081a6c-500c-4b71-89cc-bbd22d0be296.png)
5. 原因在于 `getProtocolServiceKey()` 方法是从`RpcContext`中获取，此时获取的`protocolServiceKey` 为 null，导致获取的为 instance 参数，实际需要获取对应服务的参数。
```
    public Map<String, String> getParameters() {
        String protocolServiceKey = getProtocolServiceKey();
        if (StringUtils.isEmpty(protocolServiceKey)) {
            return getInstance().getAllParams();
        }
        return getServiceParameters(protocolServiceKey);
    }
```
```
    public String getProtocolServiceKey() {
        return RpcContext.getServiceContext().getProtocolServiceKey();
    }
```

return null;
            }
        }
        return invokers;
    }
    @Override
    public <T> void notify(List<Invoker<T>> invokers) {
        List invokerList = invokers == null ? Collections.emptyList() : invokers;
        this.invokerList = invokerList;
        registerAppRule(invokerList);
        computeSubset();
    }
    private void registerAppRule(List<Invoker<?>> invokers) {
        if (StringUtils.isEmpty(remoteAppName)) {
            synchronized (this) {
                if (StringUtils.isEmpty(remoteAppName) && CollectionUtils.isNotEmpty(invokers)) {
                    for (Invoker invoker : invokers) {
                        String applicationName = invoker.getUrl().getRemoteApplication();
                        if (StringUtils.isNotEmpty(applicationName) && !INVALID_APP_NAME.equals(applicationName)) {
                            remoteAppName = applicationName;
                            MeshRuleManager.register(remoteAppName, this);
                            break;
                        }
                    }
                }
            }
        }
    }
    @Override
    public void onRuleChange(VsDestinationGroup vsDestinationGroup) {