fix chunk loading in build runtime (vercel/turborepo#6180)

### Description

fix handling of ChunkData in build runtime

### Testing Instructions

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  Give a quick description of steps to test your changes.
-->


Closes WEB-1788

crates/turbopack-ecmascript-runtime/js/src/build/runtime.ts

@@ -45,7 +45,15 @@ const RUNTIME_ROOT = path.resolve(__filename, relativePathToRuntimeRoot);
 const moduleFactories: ModuleFactories = Object.create(null);
 const moduleCache: ModuleCache = Object.create(null);
 
-function loadChunk(chunkPath: ChunkPath) {
+function loadChunk(chunkData: ChunkData): void {
+  if (typeof chunkData === "string") {
+    return loadChunkPath(chunkData);
+  } else {
+    return loadChunkPath(chunkData.path);
+  }
+}
+
+function loadChunkPath(chunkPath: ChunkPath): void {
   if (!chunkPath.endsWith(".js")) {
     // We only support loading JS chunks in Node.js.
     // This branch can be hit when trying to load a CSS chunk.
@@ -62,10 +70,13 @@ function loadChunk(chunkPath: ChunkPath) {
   }
 }
 
-function loadChunkAsync(source: SourceInfo, chunkPath: string): Promise<void> {
+async function loadChunkAsync(
+  source: SourceInfo,
+  chunkData: ChunkData
+): Promise<any> {
   return new Promise<void>((resolve, reject) => {
     try {
-      loadChunk(chunkPath);
+      loadChunk(chunkData);
     } catch (err) {
       reject(err);
       return;

crates/turbopack-tests/tests/snapshot/runtime/default_build_runtime/output/[turbopack]_runtime.js

@@ -319,7 +319,14 @@ const relativePathToRuntimeRoot = path.relative(RUNTIME_PUBLIC_PATH, ".");
 const RUNTIME_ROOT = path.resolve(__filename, relativePathToRuntimeRoot);
 const moduleFactories = Object.create(null);
 const moduleCache = Object.create(null);
-function loadChunk(chunkPath) {
+function loadChunk(chunkData) {
+    if (typeof chunkData === "string") {
+        return loadChunkPath(chunkData);
+    } else {
+        return loadChunkPath(chunkData.path);
+    }
+}
+function loadChunkPath(chunkPath) {
     if (!chunkPath.endsWith(".js")) {
         // We only support loading JS chunks in Node.js.
         // This branch can be hit when trying to load a CSS chunk.
@@ -333,10 +340,10 @@ function loadChunk(chunkPath) {
         }
     }
 }
-function loadChunkAsync(source, chunkPath) {
+async function loadChunkAsync(source, chunkData) {
     return new Promise((resolve, reject)=>{
         try {
-            loadChunk(chunkPath);
+            loadChunk(chunkData);
         } catch (err) {
             reject(err);
             return;