frozen-abi: add re-exports / patch to support rust edition 2021/2024

[puhtaytow]

Problem

Using StableAbi required consumer crates to depend directly on rand, rand_chacha, and bincode, which made ABI digests sensitive to the exact versions used in each crate.

In addition, the use of rng.gen() conflicted with the gen keyword in Rust 2024 edition to which agave is currently migrating, preventing StableAbi from being used in edition 2024 crates.

Related to anza-xyz/agave#8091

Summary of changes

• Added re-exports in frozen-abi for all crates on which StableAbi depends
• Migrated frozen-abi-macro to reference these re-exports
• Used a raw identifier for rng.r#gen() in the StableAbi trait to enable usage in crates 2021/2024 edition
• Enabled edition 2024 lints

Example

solana-sdk/account
solana-sdk/transaction
solana-sdk/vote-interface

agave/accounts-db
agave/votor-messages

[puhtaytow]

Hey @joncinque, sorry to come back with another PR on this, but i missed one detail when working on #443.. the fact that agave was in the middle of migrating to a different rand version and Rust edition at the same time.

In the previous PR I assumed that consumer crates would keep using compatible versions of rand/rand_chacha/bincode and that it was fine to rely on their dependencies directly. The agave migration exposed that this assumption was wrong.

Im really sorry, but could i please you to have a look again? 🙏 this small patch resolved issue in the solana-sdk and agave examples linked in the PR description.

[alexpyattaev]

Generally LGTM, but I think it would be prudent to add rust 2024 compat lints to frozen-abi to ensure we are not missing anything.

[alexpyattaev]

LGTM.

[joncinque]

Looks great, thanks! It might be easier to just bump rand in this repo too, but we can do that separately

[puhtaytow]

Thank you guys 🙏