Turbopack: fix `this` when accessing named properties of namespace (#80896)
Previously, this namespace-import-to-named-import optimization always caused `this` to be unbound for function calls.
Now, it is preserved (if possible. There's nothing we can do when this is scope hoisted together).
```js
import * as R from "ramda";
import { pipe } from 'ramda'
expect((0, R.pipe)()).toBe(false);
expect(R.pipe()).toBe(true);
expect(pipe()).toBe(false);
```
```js
var __TURBOPACK__imported__module__ramda = __turbopack_context__.i(
"[project]/turbopack/crates/turbopack-tests/tests/execution/turbopack/side-effects-optimization/import-star/input/node_modules/ramda/pipe.js [test] (ecmascript)"
);
it("should have the correct `this` context", () => {
expect((0, __TURBOPACK__imported__module__ramda["pipe"])()).toBe(false);
// this was previously also `(0, ns.pipe)()`
expect(__TURBOPACK__imported__module__ramda["pipe"]()).toBe(true);
expect((0, __TURBOPACK__imported__module__ramda["pipe"])()).toBe(false);
});
```
Also has a small bundle size benefit