create_random_batch fails with timestamp types having a timezone

[niebayes]

Describe the bug

The arrow::util module contains a create_random_batch function for testing purpose.
When given a schema containing a field having a timestamp type with a timezone, the function fails due to the schema of the generated record batch is not consistent with the provided schema.
That's because the create_random_array function ignores the timezone of a timestamp type.

To Reproduce

Call the create_random_batch function with a schema containing a field having a timestamp type with a timezone.

Expected behavior

The create_random_batch function should respect the timezone of a timestamp type.

Additional context