Describe the bug
Exporting binaryview arrow to pyarrow fails with

Expected at least 3 buffers for imported type binary_view, ArrowArray struct has 2

To Reproduce
Construct binaryview array and export it over c data interface to pyarrow

Expected behavior
Export should succeed without error

Additional context
I think there's ambiguity in the spec apache/arrow#43989. However, regardless of that issue it seems that export binaryview array has to do a bit extra work to produce buffer lengths