[SPARK-36427] Scala API: support CrossValidatorModel get standard deviation of metrics for each paramMap

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.2.0
• Component/s: ML
• Assignee: Unassigned
• Reporter: Weichen Xu
• Created: 05/Aug/21 09:25
• Updated: 06/Aug/21 08:14

Description

This is the parity feature of https://issues.apache.org/jira/browse/SPARK-36425

Note:
We need also update PySpark CrossValidatorModel.to_java/from_java methods in this task.

Note2:
We need support loading old version saved CrossValidatorModel