[Feature] Cdc support new synchronization mode

### Search before asking

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

### Motivation

paimon cdc 支持divided和 combined 同步模式，对大量表同步场景，两种模式都有一定局限性。一般业务数据库大表很少，可能top5内，小表比较多，两种模式都不合适。
建议一种新模式，支持为大表设置独立sink，剩余表在一个sink中，可以为每个sink 设置并发度。

### Solution

_No response_

### Anything else?

_No response_

### Are you willing to submit a PR?

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

No files, tests, or entry points are named in the issue, so first clarify the proposed CDC synchronization mode and how it differs from divided and combined modes. Done should include a defined way to assign large tables to independent sinks, group remaining tables into one sink, and configure concurrency per sink.

Written by the indexing model from the issue text.