`PartialOrd` doesn't work with new type

Bắt đầu với việc tái hiện trong crates/farmer/ab-proof-of-space-gpu/src/shader/sort_buckets.rs, đặc biệt là CustomPosition derive ở dòng 17 và phép so sánh ở dòng 80. So sánh đường dẫn PartialOrd được sinh ra cho CustomPosition với phép so sánh u32 trực tiếp, sau đó kiểm tra cách xử lý capability Int8 không mong muốn; được xem là hoàn tất khi các phép so sánh newtype biên dịch mà không yêu cầu Int8.

I have the following trivial new type:

#[derive(Debug, Clone, Copy, Ord, PartialOrd, Eq, PartialEq, From, Into)]
pub struct CustomPosition(u32);

When trying to compare two values of this type, I'm getting an error:

  error: `i8` type used without `OpCapability Int8`
       |
  note: used from within `<u32 as core::cmp::PartialOrd>::partial_cmp`
      --> /home/nazar-pc/.rustup/toolchains/nightly-2025-06-23-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/cmp.rs:1989:5
       |
  1989 |     ord_impl! { char usize u8 u16 u32 u64 u128 isize i8 i16 i32 i64 i128 }
       |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  note: called by `<ab_proof_of_space_gpu::shader::sort_buckets::CustomPosition as core::cmp::PartialOrd>::partial_cmp`
      --> crates/farmer/ab-proof-of-space-gpu/src/shader/sort_buckets.rs:17:35
       |
  17   | #[derive(Debug, Clone, Copy, Ord, PartialOrd, Eq, PartialEq, From, Into)]
       |                                   ^^^^^^^^^^
  note: called by `<ab_proof_of_space_gpu::shader::sort_buckets::CustomPosition as core::cmp::PartialOrd>::le`
      --> /home/nazar-pc/.rustup/toolchains/nightly-2025-06-23-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/cmp.rs:1403:14
       |
  1403 |         self.partial_cmp(other).is_some_and(Ordering::is_le)
       |              ^^^^^^^^^^^^^^^^^^
  note: called by `ab_proof_of_space_gpu::shader::sort_buckets::perform_compare_swap`
      --> crates/farmer/ab-proof-of-space-gpu/src/shader/sort_buckets.rs:80:32
       |
  80   |     let (smaller, larger) = if a <= b { (a, b) } else { (b, a) };
       |                                ^^^^^^

At the same time, comparison of u32 directly works fine and doesn't require Int8 capability.

While this is likely related to discussion in https://github.com/Rust-GPU/rust-gpu/issues/307, I think it is distinct enough to be reported separately.