Saving HDUList corrupts array data assigned to `BinTableHDU.data`

### Description

If a record array with an unsigned dtype is assigned to the `data` attribute of a `BinTableHDU` the data in the original array is modified when the `BinTableHDU` is saved (as seen in the example below).

Tested with `5.3` and a recently build 'nightly' `6.0.dev697+gb9b552a68` in python 3.10 on mac os (M1).

### Expected behavior

_No response_

### How to Reproduce

Running the following:

```python
from astropy.io import fits
import numpy as np

tbl = np.array([1, 2, 3], dtype=[('a', '

Run the provided NumPy reproduction through astropy.io.fits.HDUList, BinTableHDU.data, and writeto, then trace where saving changes the assigned record array. Done means the original unsigned array remains unchanged after writing the FITS file, with regression coverage for the shown case.

Written by the indexing model from the issue text.