separate framework code and lib dependencies for seata-server fatjar deployments

[slievrly]

• I have searched the issues of this repository and believe that this is not a duplicate.

Ⅰ. Issue Description

separate framework code and lib dependencies for seata-server fatjar deployments

The fatjar deployment package is too large. In use, the efficiency of development, operation and maintenance is affected because several lines of code are modified but hundreds MB of fatjar deployment needs to be uploaded. In addition, it is not conducive to the expansion and replacement of jar package dependency.

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分离 seata-server 部署时的框架和lib依赖

fatjar 部署包的体积过大。在使用中因为修改几行代码但是却需要上传上百M 的fatjar部署，影响开发运维的效率。另外，不利于jar包依赖的扩展和替换。

Ⅱ. Describe what happened

If there is an exception, please attach the exception trace:

Just paste your stack trace here!

Ⅲ. Describe what you expected to happen

Ⅳ. How to reproduce it (as minimally and precisely as possible)

1. xxx
2. xxx
3. xxx

Ⅴ. Anything else we need to know?

Ⅵ. Environment:

• JDK version :
• Seata version: 1.5.1
• OS :
• Others:

[slievrly]