Try to download wasi-sdk ahead of time (#42377)

This hopefully resolves the lingering test failures on linux,
but also adds some logging just in case this isn't the problem...

Release Notes:

- N/A

---------

Co-authored-by: Ben Kunkle <ben@zed.dev>

tooling/xtask/src/tasks/workflows/run_tests.rs

@@ -292,8 +292,8 @@ fn check_workspace_binaries() -> NamedJob {
             .runs_on(runners::LINUX_LARGE)
             .add_step(steps::checkout_repo())
             .add_step(steps::setup_cargo_config(Platform::Linux))
-            .map(steps::install_linux_dependencies)
             .add_step(steps::cache_rust_dependencies_namespace())
+            .map(steps::install_linux_dependencies)
             .add_step(steps::script("cargo build -p collab"))
             .add_step(steps::script("cargo build --workspace --bins --examples"))
             .add_step(steps::cleanup_cargo_config(Platform::Linux)),
@@ -312,13 +312,13 @@ pub(crate) fn run_platform_tests(platform: Platform) -> NamedJob {
             .runs_on(runner)
             .add_step(steps::checkout_repo())
             .add_step(steps::setup_cargo_config(platform))
+            .when(platform == Platform::Linux, |this| {
+                this.add_step(steps::cache_rust_dependencies_namespace())
+            })
             .when(
                 platform == Platform::Linux,
                 steps::install_linux_dependencies,
             )
-            .when(platform == Platform::Linux, |this| {
-                this.add_step(steps::cache_rust_dependencies_namespace())
-            })
             .add_step(steps::setup_node())
             .add_step(steps::clippy(platform))
             .add_step(steps::cargo_install_nextest(platform))

tooling/xtask/src/tasks/workflows/steps.rs

@@ -113,8 +113,14 @@ fn install_mold() -> Step<Run> {
     named::bash("./script/install-mold")
 }
 
+fn download_wasi_sdk() -> Step<Run> {
+    named::bash("./script/download-wasi-sdk")
+}
+
 pub(crate) fn install_linux_dependencies(job: Job) -> Job {
-    job.add_step(setup_linux()).add_step(install_mold())
+    job.add_step(setup_linux())
+        .add_step(install_mold())
+        .add_step(download_wasi_sdk())
 }
 
 pub fn script(name: &str) -> Step<Run> {