[Lilliput/JDK17] Fix OptoRuntime::new_array_nozero_C

There's a severe bug in OptoRuntime::new_array_nozero_C() where we could end up clearing other memory because we add a byte-sized offset to a pointer base:

```
    HeapWord* obj = cast_from_oop<HeapWord*>(result);
    if (aligned_hs_bytes > hs_bytes) {
      Copy::zero_to_bytes(obj + hs_bytes, aligned_hs_bytes - hs_bytes);
    }
```