tool: support sst dump in risectl

[hzxa21]

#2640 #782 add support for list-kv pairs in risectl. It is also beneficial for debugging to support sst dump.

Basic

We can start by adding support to show the following information via sst dump:

• SstableIdInfo stored in HummockVersion (persisted in meta store)
  • Create timestamp
  • Delete timestamp
• SstableInfo stored in HummockVersion (persisted in meta store)
  • Key range
  • VNodes
  • Prefixes
• SstableMeta persisted in object store.
  • Checksum
  • Block meta (compression algo, size, ...)
  • Bloom filter size
  • Key count
  • Version
  • ...

Advanced

We can support the following advanced usage when the basics are done:

• Verify checksum of a SST
• Iterate kv paris in a SST
  - Print kv paris in a human readble format (show table id, epoch, user key, user value)
  - Interpret kv paris based on the table schema
• Dump raw data of SST into a file
• Regenerate and comapre SST with different configurations (block size, compression, filter policy, ...)

[Graphcalibur]

All the information under "Basic" is now displayed when the sst-dump command is called.

[skyzh]

That's cool! @hzxa21 shall we also implement the advanced part? I believe it is not necessary at current stage.

[hzxa21]

Cool. We can revisit the advanced parts when needed in the future.

[ALeitert]

• Verify checksum of a SST

This is already done in SstableMeta::decode() and Block::decode().