[Fix][Connector-V2] Fix doris TRANSFER_ENCODING header error

[liugddx]

Purpose of this pull request

If there is no data for the first time, TRANSFER_ENCODING will be added to the request header. Doris initiates a redirect to be and checks whether there is TRANSFER_ENCODING in the request header. If there is, it will be abnormal, so it needs to be removed.

https://blog.csdn.net/Carson073/article/details/130088439

Does this PR introduce any user-facing change?

How was this patch tested?

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.