Update to nightly-2025-08-04.#508

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fee1-dead wants to merge 5 commits intoRust-GPU:mainfrom

fee1-dead-contrib:update-toolchain

Commits on Jan 8, 2026

Update to `nightly-2025-07-07`.

nnethercote
authored and
fee1-dead
committed
Update to `nightly-2025-07-14`.

nnethercote
authored and
fee1-dead
committed
Update to `nightly-2025-07-28`.

nnethercote
authored and
fee1-dead
committed
Update to `nightly-2025-08-04`.

nnethercote
authored and
fee1-dead
committed
Add workaround for `MaybeUninit::uninit` and bless tests
fee1-dead
committed