Rust upstream 2025-03-19#456

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calebzulawski wants to merge 2 commits intomasterfrom

rust-upstream-2025-03-19

Commits on Jan 18, 2025

Merge commit '3383cfbd3572465febc7a8f816a46304373de46a' into sync-from-portable-simd-2025-01-18
calebzulawski
committed

Commits on Feb 12, 2025

Remove ignored `#[must_use]` attributes from portable-simd
samueltardieu
committed