Support partial downloading of Snapshot

[Liuhaai]

What would you like to be added

Provide both whole and partial snapshot options in https://github.com/iotexproject/iotex-bootstrap?tab=readme-ov-file#join-mainnet

Why is this needed

It's time-consuming to download the entire snapshot even when part of data is needed.

How important you think this is for IoTeX

• [] must have
• [] should have
• [] nice to have

Additional information

Let us know any background or context that would help us better understand the request (for example the particular use-case that prompted this request)