Support MapArray in lambda clear null values

### Is your feature request related to a problem or challenge?

clearing non empty null values for map have the same benefit as clearing nulll values from list before passing the lambda udf

the benefit is to help implementors avoid common pitfall that calling the lambda function with values that should not be evaluated

### Describe the solution you'd like

support map array in `clear_null_values` for `HigherOrderUDFImpl`

### Describe alternatives you've considered

_No response_

### Additional context

I raised this after finding a possible bug in `transform_values` lambda function pr here:
- https://github.com/apache/datafusion/pull/22689#discussion_r3379546674