Turbopack: Add PURE comments for FreeVarReference::EcmaScriptModule (#80902)
Ideally, we'd refactor `Effect`s so that overlapping effects (i.e. `process.env.NODE_ENV` inlining and polyfilling the `process` variable in the browser context) don't run twice.
But this lessens the impact by making
```js
console.log(process.env.NODE_ENV);
```
produce
```js
var __TURBOPACK_imported_$process = /*@__PURE__*/ __turbopack_import__("[project]/node_modules/process/index.js");
console.log("production)";
```
so that the minifier can get rid of the import (even though the module will still be bundled).