Array data imported through the FFI might contain unaligned buffers

[felipecrv]

Describe the bug

I described the issue in detail on the arrow-adbc bug tracker:

apache/arrow-adbc#2526

To Reproduce

Executing a query through the Snowflake ADBC driver (Go) that happens to produce array with unaligned buffers. The linked issue above contains a stack trace.

Expected behavior

The Rust code importing the array should check the alignment and copy the buffers to an unaligned position if necessary.

[tustvold]

Changing this to an enhancement, as the current behaviour is intentional, even if it could be improved (e.g. returning an error instead of panicking). It would be a bug if buffer misalignment was not being caught (i.e. UB).