[Improve][Connector-V2] Improve Paimon source split enumerator

[xiaochen-zhou]

Purpose of this pull request Improve Paimon source split enumerator

Does this PR introduce any user-facing change? no

How was this patch tested? exists 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]

cc @hailin0

[dailai]

Please add test case.

[xiaochen-zhou]

Please add test case.

Thanks for your review. I think this is an optimization of the existing PaimonSourceSplitEnumerator. Currently, pamion's test case can already cover it.

[dailai]

Could you implement stream read for paimon source ? I don't think this is necessary in batch read scenarios.

[xiaochen-zhou]

Could you implement stream read for paimon source ? I don't think this is necessary in batch read scenarios.

Ok, I'd be happy to do it.

[EricJoy2048]

@dailai