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### Environment

* Dubbo version: 2.7.18
* Operating System version: macos
* Java version: 1.8

### Steps to reproduce this issue

1. 服务端采用dubbo泛化实现方式，服务端直接返回map类型的响应对象，响应对象中有list集合，list中返回的数据为map结构
2. 客户端正常调用，收到的响应数据list中的map结构没有转换为接口定义的实际java对象，导致程序做进一步处理报错
3. 经验证3.1.1 版本仍然存在该问题
4. 经排查后出问题的类为DecodeableRpcResult，代码段如下：
<img width="768" alt="image" src="https://user-images.githubusercontent.com/12338948/199507015-8b9ca5ed-17c6-475f-9190-6cf021f2dbea.png">
<img width="1115" alt="image" src="https://user-images.githubusercontent.com/12338948/199507116-9adc85b7-14c9-47c9-9b53-f94eec2f33c2.png">


Pls. provide [GitHub address] to reproduce this issue.
https://github.com/iloveoovo/dubbo-genericimpl-issue

### Expected Behavior

consumer端能正常反序列化

### Actual Behavior
consumer 端对于响应参数字段中List 字段的泛型处理错误

public void testGet_$invoke_Arguments() {
        Object[] args = new Object[] {"hello", "dubbo", 520};
        Class<?> demoServiceClass = DemoService.class;
        String serviceName = demoServiceClass.getName();
        Invoker invoker = mock(Invoker.class);
        RpcInvocation inv = new RpcInvocation("$invoke", serviceName, "",
                new Class<?>[] {String.class, String[].class, Object[].class},
                new Object[] {"method", new String[] {}, args},
                null, invoker, null);
        Object[] arguments = RpcUtils.getArguments(inv);
        for (int i = 0; i < args.length; i++) {
            Assertions.assertNotNull(arguments[i]);
            Assertions.assertEquals(args[i].getClass().getName(), arguments[i].getClass().getName());
            Assertions.assertEquals(args[i], arguments[i]);
        }
    }
    @Test
    public void testIsAsync() {
        Object[] args = new Object[] {"hello", "dubbo", 520};
        Class<?> demoServiceClass = DemoService.class;
        String serviceName = demoServiceClass.getName();
        Invoker invoker = mock(Invoker.class);
        URL url = URL.valueOf(
                "test://127.0.0.1:1/org.apache.dubbo.rpc.support.DemoService?interface=org.apache.dubbo.rpc.support.DemoService");
        RpcInvocation inv = new RpcInvocation("test", serviceName, "",
                new Class<?>[] {String.class, String[].class, Object[].class},
                new Object[] {"method", new String[] {}, args},
                null, invoker, null);
        Assertions.assertFalse(RpcUtils.isAsync(url, inv));
        inv.setInvokeMode(InvokeMode.ASYNC);