extract reward-info crate

[kevinheavey]

Problem

solana_sdk::reward_type and solana_sdk::reward_info impose a solana-sdk dependency on solana-rpc-client-api

Summary of Changes

• Move them into a single solana-reward-info crate.
• Re-export in their old modules and add deprecation notices
• Make serde optional in the new crate

[buffalojoec]

Maybe I'm missing something, but where are these types used in solana-rpc-client-api?

As a side note, it looks like everything solana-rpc-client-api depends on from the SDK has been broken up into smaller crates, except for these two:

• SignerError
• transaction::Result

Seems like we're pretty close to being able to just swap in the smaller crates for all of solana-rpc-client-api.

[kevinheavey]

Maybe I'm missing something, but where are these types used in solana-rpc-client-api?

The dependency is indirect, via solana-transaction-status-client-types

Seems like we're pretty close to being able to just swap in the smaller crates for all of solana-rpc-client-api.

Yeah this is being tracked in #3027

[buffalojoec]

Works for me. Just 2 nits.