ArrayData::slice() does not work for nested types such as StructArray

[alamb]

Describe the bug
ArrayData::slice() does not work for nested types, because only the ArrayData::buffers are updated with the new offset and length. This has caused a lot of issues in the past.

This blocks us from being able to implement RecordBatch::slice(), and has led to creating #381 to sidestep this issue.

[nevi-me]

Thanks for this @alamb, I hadn't noticed that not linking PRs to existing issues affects the changelog.

[alamb]

Thanks for this @alamb, I hadn't noticed that not linking PRs to existing issues affects the changelog.

Yes @nevi-me I don't fully understand the intricacies of the changelog generator that @jorgecarleitao found but it seems to be mostly derived from issues (rather than PRs) 🤷 I figured I will keep honing the process in future releases