[Feature Request][Spark] Add test coverage for clustering on generated columns

Feature request

Which Delta project/connector is this regarding?

• Spark
• Standalone
• Flink
• Kernel
• Other (fill in here)

Overview

Clustered tables support columns with stats collected on them, so generated column should work. We should add testing to cover this scenario.

Further details

We can add tests for generated columns in ClusteredTableDDLSuite.scala

Willingness to contribute

The Delta Lake Community encourages new feature contributions. Would you or another member of your organization be willing to contribute an implementation of this feature?

• Yes. I can contribute this feature independently.
• Yes. I would be willing to contribute this feature with guidance from the Delta Lake community.
• No. I cannot contribute this feature at this time.