[SPARK-46533][PYTHON][DOCS] Refine docstring of array_min/array_max/array_size/array_repeat

[LuciferYang]

What changes were proposed in this pull request?

This pr refine docstring of array_min/array_max/array_size/array_repeat and add some new examples.

Why are the changes needed?

To improve PySpark documentation

Does this PR introduce any user-facing change?

No

How was this patch tested?

Pass Github Actions

Was this patch authored or co-authored using generative AI tooling?

No

[LuciferYang]

The failure of the k8s IT test is unrelated to the current PR

• https://github.com/LuciferYang/spark/actions/runs/7349814765/job/20021004017

[info] Caused by: org.apache.spark.SparkException: 
[info] Error from python worker:
[info]   /usr/bin/python3: Error while finding module specification for 'pyspark.daemon' (ModuleNotFoundError: No module named 'pyspark')
[info] PYTHONPATH was:
[info]   /opt/spark/python/lib/pyspark.zip:/opt/spark/python/lib/py4j-0.10.9.7-src.zip:/opt/spark/jars/spark-core_2.13-4.0.0-SNAPSHOT.jar:/opt/spark/python:/opt/spark/python/lib/py4j-0.10.9.7-src.zip

[LuciferYang]

Merged into master. Thanks @HyukjinKwon