[Feature] CDC Ingestion support adding watermark

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/incubator-paimon/issues) and found nothing similar.

### Motivation

In more scenarios, we hope to realize automatic tag creation by setting 'tag.automatic-creation' to 'watermark'. To achieve this, CDC Ingestion needs to support watermark configuration capabilities.

### Solution

_No response_

### Anything else?

_No response_

### Are you willing to submit a PR?

- [X] I'm willing to submit a PR!

The issue does not name files, tests, or an entry point. Start by locating CDC ingestion handling and the automatic tag-creation configuration, then determine how watermark configuration should connect to tag creation; done means CDC ingestion supports the requested watermark setting for automatic tags.

Written by the indexing model from the issue text.