ng test does not run tests for all projects

# 🐞 Bug report

### Command (mark with an `x`)

- [ ] new
- [ ] build
- [ ] serve
- [X] test
- [ ] e2e
- [ ] generate
- [ ] add
- [ ] update
- [ ] lint
- [ ] extract-i18n
- [ ] run
- [ ] config
- [ ] help
- [ ] version
- [ ] doc

### Is this a regression?

Don't know

### Description

The `ng test` documentation states "When a project name is not supplied, it will execute for all projects". However, this does not appear to be true. Only the tests for a single project are run.


## 🔬 Minimal Reproduction

1. Clone https://github.com/swseverance/my-workspace
2. npm install
3. Run `ng test` and observe how only the tests for the app are run. The tests for the lib are not run.

OR

1. Create a workspace
2. Create an app within the workspace
3. Create a lib within the workspace
4. Run `ng test` and observe how only the tests for the app are run. The tests for the lib are not run.

## 🔥 Exception or Error

N/A

## 🌍 Your Environment

Angular CLI: 11.2.14

Node: 14.17.0

OS: darwin x64


Angular: 11.2.14

... animations, cli, common, compiler, compiler-cli, core, forms

... platform-browser, platform-browser-dynamic, router

Ivy Workspace: Yes

Package                         Version

---------------------------------------------------------

@angular-devkit/architect       0.1102.14

@angular-devkit/build-angular   0.1102.14

@angular-devkit/core            11.2.14

@angular-devkit/schematics      11.2.14

@schematics/angular             11.2.14

@schematics/update              0.1102.14

ng-packagr                      11.2.4

rxjs                            6.6.7

typescript                      4.1.6

**Anything else relevant?**

Commencez par la commande `ng test` et reproduisez le comportement dans le workspace lié ou dans un workspace contenant une application et une bibliothèque. Comparez le comportement documenté pour tous les projets avec la sortie observée, puis vérifiez que les tests de chaque projet du workspace s’exécutent lorsqu’aucun nom de projet n’est fourni.

Rédigé par le modèle d'indexation à partir du texte de l'issue.