pub(crate) fn remap_and_reconstruct_single_storage(
    slot: Slot,
    old_append_vec_id: usize,
    current_len: usize,
    append_vec_path: &Path,
    next_append_vec_id: &AtomicAppendVecId,
    num_collisions: &AtomicUsize
) -> Result<Arc<AccountStorageEntry>>