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.

r? @ghost