Upgrade to Rust 2024 edition

[jpraynaud]

Why

We want to upgrade the Rust edition of the repository to 2024.

What

Upgrade the Rust edition of the repository to 2024.

How

• Prepare upgrade anticipation PR
• Upgrade the Rust edition of the repository to 2024 (use the transitioning guide and tooling):
  • Dry run the new edition
  • Commit the new edition
• Update rustfmt formatting rules:
  • Update the break widths (see https://rust-lang.github.io/rustfmt/?version=v1.8.0&search=#use_small_heuristics)