fix(compiler-cli): Temp fix in program.ts issue (#22524)

Compiling a project with duplicated sub dependencies causes 'Host should not return a redirect source file from `getSourceFile`' error to be shown. This is fixed by not returning the redirected file, but rather the target of the redirect.

Closes #22524

packages/compiler-cli/src/transformers/program.ts

@@ -693,6 +693,10 @@ class AngularCompilerProgram implements Program {
     const tsFiles: string[] = [];
     tmpProgram.getSourceFiles().forEach(sf => {
       if (this.hostAdapter.isSourceFile(sf.fileName)) {
+        // Temporary fix for https://github.com/angular/angular/issues/22524
+        // Typescript has internal notion of "redirect source files"
+        // Do not return the redirected file, but rather the target of the redirect.
+        // redirectInfo is an internal property on the SourceFile interface, hence the (as any)
         if ((sf as any)['redirectInfo']) {
           sf = (sf as any)['redirectInfo'].redirectTarget;
         }