GeoPandas: implement distributed interiors

[jiayuasu]

Part of #2230.

Summary

Implement the GeoPandas-compatible GeoSeries.interiors property and GeoDataFrame delegation using Sedona's native interior-ring expressions.

The implementation must remain fully distributed. It must not call to_geopandas(), collect(), toLocalIterator(), or a Python row UDF.

Requirements

• Return a pandas-on-Spark Series containing the interior rings for each polygon.
• Preserve the input index, including named and multi-level indexes.
• Return an empty list for polygons without holes and missing values for non-polygon and null rows, matching GeoPandas.
• Support access through both GeoSeries and GeoDataFrame.
• Preserve geometry metadata for the returned ring values.
• Add API documentation and examples.

Tests

• Add direct tests covering polygons with multiple holes, polygons without holes, empty polygons, non-polygon geometries, nulls, index preservation, and GeoDataFrame delegation.
• Add GeoPandas parity tests across representative geometry and index cases.