Relax pyarrow requirement to below 15

[lmeyerov]

A recent PR pinned the minimum pyarrow version to ^15.0.0, but that's a fairly new version -- jan 21, 2024 -- and much of the pydata ecosystem is not there yet, e.g., the latest nvidia rapids is only 14.x, and much of the community is even earlier than that . This is preventing diretly including the mistral client in pydata builds as a managed dependency within louie.ai, and I'm assuming other systems would have the same challenge.

I'm guessing that pyarrow 15 format features are not necessary for the client. If so, I recommend going to the lowest supported, or if not known, removing this constraint.

References:

• 8c03f40#diff-50c86b7ed8ac2cf95bd48334961bf0530cdc77b5a56f852c5c61b89d735fd711

• https://pypi.org/project/pyarrow/#history

• https://github.com/rapidsai/cudf/blob/dda3f316cecd2cc23f97cd4fa9e44ec93efe5395/dependencies.yaml#L262

[sophiamyang]

Thanks for reporting the issue. We have removed pyarrow from the dependency.