Update how wasm-component-ld is built

Reuse preexisting macro and switch it to a "bootstrap tool" to try to
resolve build issues.

src/bootstrap/src/core/build_steps/tool.rs

@@ -329,6 +329,7 @@ bootstrap_tool!(
     GenerateWindowsSys, "src/tools/generate-windows-sys", "generate-windows-sys";
     RustdocGUITest, "src/tools/rustdoc-gui-test", "rustdoc-gui-test", is_unstable_tool = true, allow_features = "test";
     CoverageDump, "src/tools/coverage-dump", "coverage-dump";
+    WasmComponentLd, "src/tools/wasm-component-ld", "wasm-component-ld";
 );
 
 #[derive(Debug, Clone, Hash, PartialEq, Eq)]
@@ -696,34 +697,6 @@ impl Step for LldWrapper {
     }
 }
 
-#[derive(Debug, Clone, Hash, PartialEq, Eq)]
-pub struct WasmComponentLd {
-    pub compiler: Compiler,
-    pub target: TargetSelection,
-}
-
-impl Step for WasmComponentLd {
-    type Output = PathBuf;
-
-    fn should_run(run: ShouldRun<'_>) -> ShouldRun<'_> {
-        run.never()
-    }
-
-    fn run(self, builder: &Builder<'_>) -> PathBuf {
-        builder.ensure(ToolBuild {
-            compiler: self.compiler,
-            target: self.target,
-            tool: "wasm-component-ld",
-            mode: Mode::ToolStd,
-            path: "src/tools/wasm-component-ld",
-            source_type: SourceType::InTree,
-            extra_features: Vec::new(),
-            allow_features: "",
-            cargo_args: Vec::new(),
-        })
-    }
-}
-
 #[derive(Debug, Clone, Hash, PartialEq, Eq)]
 pub struct RustAnalyzer {
     pub compiler: Compiler,