[Improve][StarRocksSink] add http socket timeout.

[lightzhao]

Purpose of this pull request

add http socket timeout, prevent writes from being blocked all the time.

Does this PR introduce any user-facing change?

No, there is a default configuration, which does not affect.

How was this patch tested?

e2e test.

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 change log that in connector document. For more details you can refer to connector-v2
  2. Update plugin-mapping.properties and add new connector information in it
  3. Update the pom file of seatunnel-dist
• Update the release-note.

[Hisoka-X]

HTTP_SOCKET_TIMEOUT_MS has default value. So I think you should use config.get(StarRocksSinkOptions.HTTP_SOCKET_TIMEOUT_MS) instead of config.getOptional(StarRocksSinkOptions.HTTP_SOCKET_TIMEOUT_MS). It always return a value used to setHttpSocketTimeout

[lightzhao]

done.

[Hisoka-X]

Please add some comment

[Hisoka-X]

LGTM