bug: Cannot generate app-shell (Angular)

# Bug Report

**Ionic version:**
[x] **5.x**

**Current behavior:**
Command `ng generate app-shell ` in "fresh" Ionic gives error:

```
Schematic input does not validate against the Schema: {}
Errors:

Data path "" should have required property 'clientProject'.
```

**Expected behavior:**

User should be able to exec `ng generate app-shell` when he chose Angular during the generation of a new Ionic application

**Ionic info:**
```
Ionic:

Ionic CLI : 6.0.1 (/usr/local/lib/node_modules/@ionic/cli)
Ionic Framework : @ionic/angular 5.0.7
@angular-devkit/build-angular : 0.803.26
@angular-devkit/schematics : 8.3.26
@angular/cli : 8.3.26
@ionic/angular-toolkit : 2.2.0

Utility:

cordova-res : not installed
native-run (update available: 1.0.0) : 0.3.0

System:

NodeJS : v13.11.0 (/Users/test/.nvm/versions/node/v13.11.0/bin/node)
npm : 6.14.4
OS : macOS Catalina
```