Ref config

[thirsd]

thanks to @hailin0 https://github.com/hailin0.

reference the design:
#8945 (comment)

Does this PR introduce any user-facing change?

yes
user can use ref config file to reuse config in job config file.

#8941

How was this patch tested?

1. i have tested unset ref file .
2. i have tested set ref file and use in mysql to console and sqlite to console.

Check list

• [x ] If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• [ x] If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs
• [x ] If you are contributing the connector code, please check that the following files are updated:
  1. Update plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config
• [ x] Update the release-note.

[liunaijie]

From the code, looks if the mysql_prod ref config also contains query parameter, it will overwrite the existed query parameter.

pluginConfig.withoutPath("__st_config_ref_key__").withFallback(refConfig);

Please add the priority for replacements when there are duplicate parameters.

[thirsd]

got it

[liunaijie]

got it

We can just describe it in the document to let use know this thing. Replace behavior is good to me.

[thirsd]

已经补充了配置优先级。

[liunaijie]

Please add test case