message: refactor(compiler-cli): integrate extended diagnostics with the language service
  Add the call to get the extended template diagnostics in
  the compiler's `getDiagnosticsForComponent`. This makes showing
  extended diagnostics in non-ts files posible.
  Refs
  PR Close
diff: @@ -465,7 +465,13 @@ export class NgCompiler {
  getDiagnosticsForComponent(component: ts.ClassDeclaration): ts.Diagnostic[] {
  const compilation = this.ensureAnalyzed();
  const ttc = compilation.templateTypeChecker;
  - return this.addMessageTextDetails(ttc.getDiagnosticsForComponent(component));
  + const diagnostics: ts.Diagnostic[] = [];
  + diagnostics.push(...ttc.getDiagnosticsForComponent(component));
  + if (this.options._extendedTemplateDiagnostics) {
  + const extendedTemplateChecker = compilation.extendedTemplateChecker;
  + diagnostics.push(...extendedTemplateChecker.getDiagnosticsForComponent(component));
  + }
  + return this.addMessageTextDetails(diagnostics);
  }
  /**
  