[Enhancement] Supplementary Snapshot information

### Search before asking

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

### Motivation

相比 iceberg , paimon 的 snapshot json 展示信息缺少 location 等信息

### Solution

补充完整

### Anything else?

_No response_

### Are you willing to submit a PR?

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

The issue names no file, test, or entry point. First compare Paimon's snapshot JSON with the corresponding Iceberg information, especially location and other missing fields, then locate the code that produces the snapshot JSON. Done means the requested supplementary information is included and covered by relevant tests.

Written by the indexing model from the issue text.