chore: update to Rust 2024 edition (#10114)
### Description
update to 2024 edition:
- force 2021 style formatting to avoid huge formatting changes (>1000)
lines (this still doesn't disable all 2024 edition formatting things)
- exclude turborepo-lib from edition bump as tracing macros are not
ready for `use<>` syntax required in several places; exclude
turborepo-filewatch because I don't have macos machine to properly
address failures
- edition 2024 lints:
- impl Trait lifetimes:
https://doc.rust-lang.org/edition-guide/rust-2024/rpit-lifetime-capture.html
- various ref/ref mut cleanups:
https://doc.rust-lang.org/edition-guide/rust-2024/match-ergonomics.html
- `gen` is now a keyword, use `r#gen` to fix compile error:
https://doc.rust-lang.org/edition-guide/rust-2024/gen-keyword.html
- env::set_var is unsafe:
https://doc.rust-lang.org/edition-guide/rust-2024/newly-unsafe-functions.html
- extern blocks are unsafe:
https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html
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