build: remove references to tsc-wrapped (#19298)

With this commit `ngc` is used instead of `tsc-wrapped` for
collecting metadata and tsickle rewriting and `tsc-wrapped`
is removed from the repository.

`@angular/tsc-wrapped@5` is now deprecated and is no longer
used, updated, or maintained as part as of Angular 5.x.x.

`@angular/tsc-wrapped@4` is still maintained and required by
Angular 4.x.x and will be maintained as long as 4.x.x is in
LTS.

PR Close #19298

aio/tools/examples/example-boilerplate.js

@@ -41,7 +41,6 @@ const ANGULAR_PACKAGES = [
   'platform-browser-dynamic',
   'platform-server',
   'router',
-  'tsc-wrapped',
   'upgrade',
 ];