Add risc0 acceleration patch for ed25519

[dubbelosix]

Description

Add patches for ed25519 acceleration.

[patch.crates-io]
sha2 = { git = "https://github.com/risc0/RustCrypto-hashes", tag = "sha2/v0.10.6-risc0" }
ed25519-dalek = { git = "https://github.com/risc0/curve25519-dalek", tag = "curve25519-4.1.0-risczero.1" }
crypto-bigint = {git = "https://github.com/risc0/RustCrypto-crypto-bigint", tag = "v0.5.2-risc0"}

The difference in the benchmark is -

verify               | 714955

vs

verify               | 3579797

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9825a71) 80.1% compared to head (1d7609f) 80.2%.
Report is 1 commits behind head on nightly.

Additional details and impacted files

see 18 files with indirect coverage changes