注册发现功能和配置管理功能是否可以插件化，不随版本发布即插即用

## Why you need it?
1. 就像linux内核的发行周期不符合业务团队的诉求，ebpf允许插件化的将功能内置在OS。当我们期望合入注册发现和配置管理能力，需要等待seata的发行
2. 随着合入的注册发现和配置管理impl越来越多，编译构建出的包也会随之增大，没有裁剪。

## How it could be?
我需要一种插件化的机制，能够开发这些插件，接入到自己的系统当中。

## Other related information
seata对注册发现和配置管理有哪些技术规格约束，是否存在约束？

No files, tests, or entry points are named. Start by surveying the existing registration, discovery, and configuration-management implementations and documenting their technical constraints. A complete result would define a plugin boundary, integration path, and packaging behavior without requiring a Seata release.

Written by the indexing model from the issue text.