Test

Add `linux_raw` opt-in backend #1846

Job	Run time
Cross (aarch64-unknown-linux-gnu)	33s
Cross (powerpc-unknown-linux-gnu)	27s
FreeBSD VM	3m 6s
iOS Simulator	7m 3s
Linux (x86_64-unknown-linux-musl)	19s
OpenBSD VM	2m 10s
Sanitizer	33s
Linux (i686-unknown-linux-musl)	19s
Tier 1 (ubuntu-24.04, nightly)	14s
WASI	20s
Tier 1 (ubuntu-24.04, beta)	18s
Web	29s
Windows (stable-x86_64-gnu)	44s
Tier 1 (ubuntu-24.04, stable)	15s
Web with Atomics	1m 23s
Windows 7 (on Windows 10)	1m 31s
Tier 1 (ubuntu-24.04, 1.63)	17s
Windows (stable-i686-gnu)	40s
Tier 1 (windows-2022, nightly)	40s
Windows (stable-i686-msvc)	38s
Tier 1 (windows-2022, beta)	35s
Tier 1 (windows-2022, stable)	1m 38s
Tier 1 (windows-2022, 1.63)	43s
Tier 1 (macos-14, stable)	19s
	25m 14s

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