refactor(@angular-devkit/build-angular): avoid double emit of TypeScript files in AOT with esbuild

Some TypeScript files may previously have been emitted twice during builds when using the Angular compiler
esbuild plugin used within the esbuild-based browser application builder. It did not cause any build problems.
However, it may have caused builds to take longer than expected. This was caused by an incorrect comparison of the
transformed source file and the original source file found within the TypeScript program. Comparisons during
emit now compare only original source files which avoids the issue with the emitted files checks.

Author: clydin

packages/angular_devkit/build_angular/src/tools/esbuild/angular/compilation/aot-compilation.ts

@@ -189,7 +189,7 @@ export class AotCompilation extends AngularCompilation {
       }
 
       assert(sourceFiles?.length === 1, 'Invalid TypeScript program emit for ' + filename);
-      const sourceFile = sourceFiles[0];
+      const sourceFile = ts.getOriginalNode(sourceFiles[0], ts.isSourceFile);
       if (angularCompiler.ignoreForEmit.has(sourceFile)) {
         return;
       }