[Feature] Restore feature vnode checksum <group_id>

[zipper-meng]

Required checklist

• Sample config files updated (config,meta/config and default config)
• If there are user-facing changes, the documentation needs to be updated prior to approving the PR( Link )
• If there are any breaking changes to public APIs, please add the api change label. - No
• Signed CLA (if not already signed)

Which issue does this PR close?

#1641

Rationale for this change

1. Restore commented code to get vnode checksum, and fit the new compaction iterator.
2. Improve implements of std::fmt::Display of each hash tree structs, the prints now use JSON format.

Are there any user-facing changes?

Change