feat(ivy): JIT renders the TODO app (#24138)

This commit builds out enough of the JIT compiler to render
//packages/core/test/bundling/todo, and allows the tests to run in
JIT mode.

To play with the app, run:

bazel run --define=compile=jit //packages/core/test/bundling/todo:prodserver

PR Close #24138

packages/compiler/src/ml_parser/html_whitespaces.ts

@@ -49,7 +49,7 @@ export function replaceNgsp(value: string): string {
  * whitespace removal. The default option for whitespace removal will be revisited in Angular 6
  * and might be changed to "on" by default.
  */
-class WhitespaceVisitor implements html.Visitor {
+export class WhitespaceVisitor implements html.Visitor {
   visitElement(element: html.Element, context: any): any {
     if (SKIP_WS_TRIM_TAGS.has(element.name) || hasPreserveWhitespacesAttr(element.attrs)) {
       // don't descent into elements where we need to preserve whitespaces