Support for more delta/parquet data types

[c_mettler]

The nested types array, map, and struct, along with the unnest function, are widely used by other vendors. Adding T-SQL support to the SQL Server/Warehouse family would greatly improve and enable interoperability between third-party delta/parquet-based systems.

[udaykumarreddy_]

Lakehouse SQL Endpoint support for nested types array, map, and struct is an essential feature

[BHouston1]

Appears to be unsupported currently for both Lakehouse and Warehouse