Observability task: provide compatibility package of index burying points for the lower version of dubbo

- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
- [ ] I have searched the [release notes](https://github.com/apache/dubbo/releases) of this repository and believe that this is not a duplicate.

## Describe the feature

En:At present, the version of dubbo3.2 already supports simple monitoring indicator burying points. However, users of dubbo2 and dubbo3.2 and below cannot use the burying point function provided by dubbo. There are more users in the lower version. For the version of dubbo3.2 and below, key indicator items can be directly buried in the compatibility package by providing an additional lightweight monitoring burying point dependency package.

中文：目前dubbo3.2的版本中已经支持简单的监控指标埋点了，但是对于dubbo2和dubbo3.2以下的版本的用户是无法使用dubbo提供的埋点功能的，低版本用户相对更多，针对dubbo3.2以下的版本可以通过额外提供一个轻量级的监控埋点依赖包的形式直接将关键指标项在兼容包中进行埋点即可。