ci: Add pyarrow to wheel build test dependencies
The tests in tests/dataframe import pyarrow in multiple files, but it
wasn't being installed alongside the other test dependencies (ray,
pytest, pandas, pytz, numpy). This was causing test failures in the
nightly S3 publish workflow.
Slack thread: https://eventualgroup.slack.com/archives/C04S6C067EU/p1769935300945999?thread_ts=1769928453.659629&cid=C04S6C067EU
https://claude.ai/code/session_01AQAqWAAYWJqsNFmyuQmjDB
fix(ci): add missing test dependencies pytz and numpy to wheel tests
The nightly wheel tests were failing because tests/dataframe/test_temporals.py
imports pytz which was not installed in the minimal test environment.
Also adds numpy since several other test files (test_iter.py, test_shuffles.py,
etc.) import numpy.
The PR tests pass because they use `uv sync --all-extras --all-groups` which
installs all dev dependencies, while the wheel tests only installed
`ray pytest pandas`.
https://claude.ai/code/session_019GJn5ESmtvSzBAq7W8jtdU