dubbo-admin mock功能是否支持泛化调用

在使用dubbo-admin mock功能的时候，如果调用方是泛化调用 是直接寻找泛化类型的mock，这看起来未做兼容。

Start by tracing the dubbo-admin mock functionality and how it resolves calls made through generic invocation. Compare that path with ordinary mock lookup and identify the expected compatibility behavior. Done means generic callers can locate and use the appropriate mock without breaking existing invocation handling.

Written by the indexing model from the issue text.