Update wasi-sdk used in CI/releases

[alexcrichton]

This is similar to prior updates such as 149037 in that this is just updating a URL. This update though has some technical updates accompanying it as well, however:

• The wasm32-wasip2 target no longer uses APIs from WASIp1 on this target, even for startup. This means that the final binary no longer has an "adapter" which can help making instantiation of a component a bit more lean.

• In 147572 libstd was updated to use wasi-libc more often on the wasm32-wasip2 target. This uncovered a number of bugs in wasi-libc such as 149864, 150291, and 151016. These are all fixed in wasi-sdk-30 so the workarounds in the standard library are all removed.

Overall this is not expected to have any sort of major impact on users of WASI targets. Instead it's expected to be a normal routine update to keep the wheels greased and oiled.

[rustbot]

r? @jieyouxu

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The reviewer was selected based on:

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• infra-ci expanded to Kobzol, Mark-Simulacrum, jdno, jieyouxu, marcoieni
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[rust-log-analyzer]

The job tidy failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

##[endgroup]
[TIMING:end] tool::ToolBuild { build_compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu, tool: "tidy", path: "src/tools/tidy", mode: ToolBootstrap, source_type: InTree, extra_features: [], allow_features: "", cargo_args: [], artifact_kind: Binary } -- 11.571
[TIMING:end] tool::Tidy { compiler: Compiler { stage: 0, host: x86_64-unknown-linux-gnu, forced_compiler: false }, target: x86_64-unknown-linux-gnu } -- 0.000
fmt check
Diff in /checkout/library/std/src/sys/thread/unix.rs:44:
     // unsafe: see thread::Builder::spawn_unchecked for safety requirements
     #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
     pub unsafe fn new(stack: usize, init: Box<ThreadInit>) -> io::Result<Thread> {
-
         let data = init;
         let mut attr: mem::MaybeUninit<libc::pthread_attr_t> = mem::MaybeUninit::uninit();
         assert_eq!(libc::pthread_attr_init(attr.as_mut_ptr()), 0);
fmt: checked 6701 files
Bootstrap failed while executing `test src/tools/tidy tidyselftest --extra-checks=py,cpp,js,spellcheck`
Build completed unsuccessfully in 0:00:48
  local time: Thu Feb  5 18:35:26 UTC 2026
  network time: Thu, 05 Feb 2026 18:35:26 GMT