[requirements] Add PyArrow to ray[tune] dependencies (ray-project#34397)

Ray Tune depends on PyArrow for filesyncing. However, `ray[tune]` currently does not include pyarrow as a dependency, which means version constraints are not enforced and syncing is not guaranteed to work out of the box.

This surfaced as a problem when a user used poetry with `ray[tune]` as a constraint, but an incompatible version of pyarrow was installed. In this case, syncing to cloud storage was broken.

Signed-off-by: Kai Fricke <kai@anyscale.com>

python/setup.py

@@ -254,7 +254,7 @@ def get_packages(self):
             "smart_open",
         ],
         "serve": ["uvicorn", "requests", "starlette", "fastapi", "aiorwlock"],
-        "tune": ["pandas", "tabulate", "tensorboardX>=1.9", "requests"],
+        "tune": ["pandas", "tabulate", "tensorboardX>=1.9", "requests", pyarrow_dep],
         "k8s": ["kubernetes", "urllib3"],
         "observability": [
             "opentelemetry-api",