Workspace package - publib-npm fails to detect dist/js/*.tgz and creates new empty tgz

Hello,

While working with a monorepo setup I noticed the following bug in the `publib-npm` publisher.

I currently have the following setup in a project:
```
root
- node_modules
- pacakge.json
- packages
- module-A
- dist/js/*.tgz
- package.json
```

I've attached my project setup in the zip: [project.zip](https://github.com/user-attachments/files/16373042/project.zip)

### Problem
When running `publib-npm` from the directory `packages/module-A` it fails to detect the `dist/js/*.tgz` and creates a new package. If at that time the compiled files are not available this results in an empty package being published.

The setup with the monorepo can publish python packages with `publib-pypi` successfully.

### Workaround
As a workaround I currently configured `jsii` to output the packages to the dist directory in the root with `"outdir": "../../dist",`. When I then call the `publib-npm` from the root directory, the package gets published successfully.