Cloud builds are slower since nativescript-dev-webpack v0.14.0

[sis0k0]

Issue Checklist

• You are submitting: a bug report.
• You verified that this is a real problem by searching the NativeScript Forum and the other issues in this repo.
• You checked our demo apps and the documentation for sample usage.

Problem

Since the nativescript-dev-webpack plugin started adding a dependency to @angular-devkit/build-angular instead of @ngtools/webpack the cloud builds with NativeScript for Windows went from 10min to 15min. The change was introduced by #571 and is released with v0.14.0.
The installation of @angular-devkit/build-angular is slow on Windows, because this package has quite a lot of dependencies - 373 packages in total.

Solution

We'll revert the new behavior and go back to adding a dependency to @ngtools/webpack instead of @angular-devkit/build-angular.
The nativescript-dev-webpack plugin shouldn't add @ngtools/webpack if the project already have a dependency to @angular-devkit/build-angular. This will fix the third problem, described in #569:

For Angular projects one of the added dependencies is @ngtools/webpack. However, the @angular-devkit/build-angular package has a dependency to @ngtools/webpack. That means that if your project has a dependency to @angular-devkit/build-angular (as the default NG web projects do), this can lead to multiple versions of the @ngtools/webpack plugin in your project. Having multiple versions of that plugin causes the webpack compilation to fail - angular/angular-cli:packages/ngtools/webpack/src/loader.ts@master#L36-L43.

Local environment

• Platform: Windows
• Node version: 9.5.0
• NativeScript CLI version: 4.1.3

Project data

• Platform you are building the app for: Android