wip: relax upper pyarrow bound

[rauerhans]

implements https://github.com/databricks/databricks-sql-python/issues/427

[kravets-levko]

@rauerhans Thank you for submitting this! I see you marked it as "WIP" - please let me know when you're done with this change, so I can review and merge

[cpcloud]

Would be great to get this merged!

[arredond]

I see the fix here is to move to pyarrow<18.0 as the upper bound. Would you consider not adding an upper bound at all? Upper bounds really make dependency management much, much harder for complex projects.

Here's a nice discussion on the topic.