sort: unknown lint clippy::suspicious_open_options on OpenBSD

[lcheylus]

On OpenBSD stable (current version 7.5), Rust version = 1.76.0

During CI lint with cargo clippy, I have the error unknown lint: clippy::suspicious_open_options in src/uu/sort/src/sort.rs, line 254.

Indeed, the check for suspicious_open_options is supported only with Rust >= 1.77.0 => https://rust-lang.github.io/rust-clippy/master/index.html#/suspicious_open_options

On OpenBSD 7.5 with Rust 1.76, this check must be disabled in src/uu/sort/src/sort.rs.

[tertsdiepraam]

This feels kind of like something we could just ignore for now. With clippy we just follow stable and even with this warning it still compiles and they might even upgrade fairly soon and then the warning will disappear.

[lcheylus]

I'm working to add CI for OpenBSD, based on vmactions/openbsd-vm. This action uses OpenBSD stable (current = 7.5) version.

rustup is not supported on OpenBSD :( and I need to install the rustc/cargo packages from OpenBSD ports. rustc/cargo version = 1.76 on OpenBSD stable/7.5 and will not be updated before the next stable release (future version 7.6, release ~ October 2024).

To have a working "Style/Lint" job on OpenBSD, I need to disable clippy::suspicious_open_options in src/uu/sort/src/sort.rs on OpenBSD. Otherwise, my "Style/Lint" job fails on OpenBSD.

I will push a PR to fix this issue (tested on OpenBSD and FreeBSD in my forked repo).