Clippy linting is very slow

I switched to using clippy for linting GPU code in CI and I think it increased CI time by ~8 minutes.
I don't think it should take 8 minutes to run cargo clippy though.

Here is CI run where build.rs for GPU crate was skipping all the work under Clippy: https://github.com/nazar-pc/abundance/actions/runs/21787689837/job/62861720690#step:11:1022
Here is CI run where SpirvBuilder::clippy() is called: https://github.com/nazar-pc/abundance/actions/runs/21905750349/job/63245490660#step:11:1023

Clippy time for ab-farmer crate that includes ab-proof-of-space-gpu as a dependency increased from ~2 minutes to over 10 minutes.

Dependencies for SPIR-V are fairly minimal too and should not take nearly as much time to compile and lint: https://github.com/nazar-pc/abundance/blob/c55eae7482783aea52f0f1e9510e71378c9f10b8/crates/farmer/ab-proof-of-space-gpu/Cargo.toml#L19-L23

I do not know what could it possibly be doing for such a long time, but I do not like it.

リンクされている CI の実行結果を比較することから始め、GPU crate の build.rs と SpirvBuilder::clippy() の呼び出しに注目してください。crates/farmer/ab-proof-of-space-gpu/Cargo.toml に記載されている SPIR-V 依存関係を調査してください。完了の条件は、Clippy によって ab-farmer CI に約 8 分が追加される理由を特定し、新しい実行結果の証拠によってそのリグレッションを縮小することです。