doc: clarify the prerequisites for building with VS2017

* "Edition" is ambiguous. For example, Visual Studio Team Explorer 2017
  is listed under "Visual Studio 2017", but Build Tools for Visual
  Studio 2017 is listed under "Other Tools and Frameworks".
* The listed required components are insufficient. VS2017 also needs
  "Visual Studio C++ core features", and Build Tools also needs
  "Visual C++ Build Tools core features".
* Installing the workload with the default optional components takes up
  only about 1GB more space than the minimal set of components, but
  saves scrolling through the long list of individual components.

PR-URL: https://github.com/nodejs/node/pull/16903


Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: João Reis <reis@janeasystems.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>