Do not require zone.js for angular-builders/jest

[luca-tl]

Is your feature request related to a problem? Please describe.
I want to run my angular application zoneless, but angular-builders/jest requires zone.js. See here https://github.com/just-jeb/angular-builders/blob/master/packages/jest/src/jest-config/setup.ts

Describe the solution you'd like
jest-preset-angular does have a setupZonelessTestEnv. Make this available to be used, so that I do not have to have a dependency to zone.js in my packages to run jest tests via the angular-builders

Describe alternatives you've considered
What works is to circumvent angular-builders/jest and just call jest directly without ng test and call the setup yourself.