Support custom disk configuration via storage level

Why it matters

This feature allows users to specify which disk storage to use for Iceberg and DeltaLake tables, providing greater control over data placement and performance optimization, especially in multi-disk environments.

How to use it

Users can set the disk parameter in the storage level configuration when creating or altering Iceberg and DeltaLake tables to assign them to a specific disk. For example, specify disk in the table's storage policy settings to control data storage location.