build(aio): fix testing of NgPackagesInstaller and bring up-to-date with 4.4.x version

[gkalpak]

This PR "foreports" the changes made to NgPackagesInstaller in #19600. These include:

1. Fixing some tests and make sure the tests are run on CI (previously they weren't).
2. Bring the two implementations closer (so that future maintainance is easier). This adds two new features:
   1. Be able to look into more directories for local Angular packages (e.g. previously tsc-wrapped was built in dist/tools/@angular/ instead of dist/packages-dist/).
   2. Be able to handle local Angular packages that depend directly on other local Angular packages (e.g. previously compiler-cli used to depend on tsc-wrapped). By "depend directly", I mean as dependencies, not peerDependencies.

(Note: The new features are not necessary for master atm, but could become necessary in the future.)

[mary-poppins]

You can preview db01c51 at https://pr19655-db01c51.ngbuilds.io/.

[petebacondarwin]

We should also fix up the devDependencies in locally built packages too.
LGTM otherwise

[gkalpak]

Good catch! PTAL.

[mary-poppins]

You can preview 848c1da at https://pr19655-848c1da.ngbuilds.io/.

[petebacondarwin]

Of course, now the last commit will need to be backported to 4.4.x 🙀

[mary-poppins]

You can preview dd4fc1d at https://pr19655-dd4fc1d.ngbuilds.io/.

[gkalpak]

Backported in #19687.

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