Turbopack: prevent ParseResult recomputation (#81244)
There was a mistake here: `process_parse_result` consumes the `ParseResult` via `ReadRef::try_unwrap`, but then inside of that, `EsmExports ::code_gen` does another read of the same cell with `parse_result.await?`. That required a recomputation because the cell was destroyed shortly before.
Don't do that anymore.
Now, this is the only remaining recomputation, but that is somewhat expected (multiple facade modules have the same empty `ParseResult`):
