[Feature Request][Spark] Update ScalaExtensions to be consistent with Scala2.13 API

[chirag-s-db]

Feature request

Which Delta project/connector is this regarding?

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

Overview

Currently, Delta-Spark Scala extensions contains whenNot, which is identical to functionality in Scala 2.13 Option.unless. We should update ScalaExtensions (and callers) to change this method to Option.unless` such that we can eventually migrate to Scala 2.13 and remove the ScalaExtensions.

Further details

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.