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Auto merge of #156900 - folkertdev:stdarch-sync-2026-05-25, r=folkertdev
stdarch subtree update
Subtree update of `stdarch` to https://github.com/rust-lang/stdarch/commit/5e930b6ecfb23546096db5e026f04d957a626f1e.
Created using https://github.com/rust-lang/josh-sync.
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