Clippy: Deprecating `feature = "cargo-clippy"`

Submitted ⁨⁨1⁩ ⁨year⁩ ago⁩ by ⁨reedbot⁩ to ⁨rust⁩

https://blog.rust-lang.org/2024/02/28/Clippy-deprecating-feature-cargo-clippy.html