[SPARK-7008][INFRA][PS] Upgrade pyarrow to 15.0 in image python-ps-minimum

### What changes were proposed in this pull request?
Upgrade pyarrow to 15.0 in image python-ps-minimum

### Why are the changes needed?
features from newer versions of pyarrow has been used recently

### Does this PR introduce _any_ user-facing change?
no

### How was this patch tested?
pr builder with:
```
default: '{"PYSPARK_IMAGE_TO_TEST": "python-ps-minimum", "PYTHON_TO_TEST": "python3.10"}'
```

see https://github.com/zhengruifeng/spark/actions/runs/16486274287/job/46611454898

### Was this patch authored or co-authored using generative AI tooling?
no

Closes #51645 from zhengruifeng/ps_arrow_15.

Authored-by: Ruifeng Zheng <ruifengz@apache.org>
Signed-off-by: Ruifeng Zheng <ruifengz@apache.org>

Author: zhengruifeng

dev/spark-test-image/python-ps-minimum/Dockerfile

@@ -62,7 +62,7 @@ RUN apt-get update && apt-get install -y \
     zlib1g-dev
 
 
-ARG BASIC_PIP_PKGS="pyarrow==11.0.0 pandas==2.2.0 six==1.16.0 numpy scipy coverage unittest-xml-reporting"
+ARG BASIC_PIP_PKGS="pyarrow==15.0.0 pandas==2.2.0 six==1.16.0 numpy scipy coverage unittest-xml-reporting"
 # Python deps for Spark Connect
 ARG CONNECT_PIP_PKGS="grpcio==1.67.0 grpcio-status==1.67.0 googleapis-common-protos==1.65.0 graphviz==0.20 protobuf"