The baseUrl is used for non relative module imports, and we should always use the baseUrl set in the workspace tsconfig. When having path mappings set at workspace level and setting a `baseUrl` in the server tsconfig, this paths will no longer work as paths mapping as relative to the baseUrl.
Fixes#13935
Currently when using `ivy-ngcc` it will print out a warning
```
Failed to read entry point info from //node_modules/@schematics/angular/workspace/files/package.json with error SyntaxError: Unexpected token < in JSON at position 1121.
```
Fixes#13378
