fix(turbopack): Split ModulePart into eval vs non-eval (#70782)
### What?
Treat `baz` in the code below as a re-export.
```js
import { baz } from '../actions'
// Ensure side effects won't affect tree shaking and DCE
console.log(1)
export { baz }
```
### Why?
It's required to fix tree shaking for client bundles.
x-ref: https://vercel.slack.com/archives/C07GX6S95UG/p1727270139934499
### How?
Co-authored-by: Tobias Koppers <tobias.koppers@googlemail.com>
