Closes #7677 by eliminating the _stackoverflow execption_. In general it seems _too adventurous_ to walk members of random foreign objects. There can be anything including cycles. Rather than trying to be too smart in these cases, let's just rely on `InteropLibrary.isIdentical` message.

# Important Notes
Calling `sort` on the `numpy` array no longer yields an error, but the array isn't sorted - that needs a fix on the Python side: https://github.com/oracle/graalpython/issues/354 - once it is in, the elements will be treated as numbers and the sorting happens automatically (without any changes in Enso code).