raw tagged template literals show escapes for non ascii text

### What version of Bun is running?

_No response_

### What platform is your computer?

_No response_

### What steps can reproduce the bug?

```
function what({ raw }) {
  console.log(raw)
}

what`弟気`
```

### What is the expected behavior?

`[ '弟気' ]`

### What do you see instead?

`[ "\\u5F1F\\u6C17" ]`

### Additional information

Related: #7540