Is your feature request related to a problem or challenge?

#18903 introduced a small workaround for creating a null array. This was necessary due to a bug in arrow-rs that has been fixed (apache/arrow-rs#8900). As new_null is the "go-to" way of creating a null array, we should use this functions once we depend on an arrow-rs version that contains the fix.

Describe the solution you'd like

Remove the builder call and use FixedSizeBinaryArray::new_null again. The test should remain to catch any future problems.

Describe alternatives you've considered

No response

Additional context

No response