[Hotfix][Transform][Sql] function concat_ws handle array type， avoid write [Ljava.lang.String.

[sohurdc]

Purpose of this pull request

When transform from Hive to MySQL, if there are columns of array type, using the concat_ws function for transformation will result in writing [Ljava.lang.String. This is because the array type does not implement the toString method, so special handling is required. Loop through and process the array type one by one.

Does this PR introduce any user-facing change?

No

How was this patch tested?

I added unit tests, but did not add e2e tests.

Check list

• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs
• 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
• Update the release-note.

[Hisoka-X]

Thanks @sohurdc ! Could you add some null value in array to test?

[sohurdc]

ok

[Hisoka-X]

LGTM. Thanks @sohurdc !

[Hisoka-X]

Please re-try failed ci.