preserve-symlinks parameter is missing for ng test

[intellix]

Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x] feature request

Versions.

1.3.0

Desired functionality.

Would like to use a monorepo using something like lerna/yarn workspaces and testing gives errors which can be sidetracked by using a symlinked @angular directory in the local node_modules folder:

ng test --preserve-symlinks

Mention any other details that might be useful.

Example repository: https://github.com/spektrakel-blog/a-glimpse-at-yarn-workspaces
PR/Issue: sparkles-dev/a-glimpse-at-yarn-workspaces#2

[Euronia]

Similar to #7081

[intellix]

Ahah, thought I didn't find anything, thanks :)

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