### What?
Toolchain is updated as well.
Should improve compile times marginally, also added the new parallel
frontend.
Depends on https://github.com/vercel/turbo/pull/7409
Closes PACK-2526
This updates the rust toolchain to 2023-11-16 and:
- Removes now-unnecessary `#![feature(async_fn_in_trait)]`
- Applies auto-fixable lint fixes
- Uses `Cargo.toml` new `lint` section instead of command line rustc flags
Test Plan: Tested with updated turbo in a create-next-app
Closes PACK-1979
Co-authored-by: OJ Kwon <1210596+kwonoj@users.noreply.github.com>