fix(@angular-devkit/build-angular): avoid collect stats from chunks w…

…ith no files

This commit updates to bundle stats logic to skip checking chunks with no files.

Closes #23717

(cherry picked from commit 7de9b47)

packages/angular_devkit/build_angular/src/webpack/plugins/analytics.ts

@@ -172,7 +172,7 @@ export class NgBuildAnalyticsPlugin {
   protected _collectBundleStats(compilation: Compilation) {
     const chunkAssets = new Set<string>();
     for (const chunk of compilation.chunks) {
-      if (!chunk.rendered) {
+      if (!chunk.rendered || chunk.files.size === 0) {
         continue;
       }