Refactoring is used to provide admin with your metadata storage.

[songxiaosheng]

When Dubbo SDK starts, the metadata of providers and consumers will be cached in the registry for easy retrieval by the admin service. We can try to remove the registration of this metadata and register the admin service in the registry. After the application starts, it actively pushes data to the admin. The admin periodically pulls data from within each application through the interface to reduce the amount of data registered by SDK with the registry