Support creating arrays with non-nullable elements in `make_array`

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

`make_array` currently hard codes that all return types and arrays returned from invoke have a nullable element.

### Describe the solution you'd like

Check the input expressions, and if all are non-nullable, the array element should be non-nullable

### Describe alternatives you've considered

_No response_

### Additional context

Discovered this while trying to implement array creation support in datafusion-comet

Start by locating the make_array implementation and the invoke return-type handling described in the issue. Trace how input expression nullability is checked, then verify that arrays built only from non-nullable expressions have non-nullable elements while nullable inputs preserve nullable elements.

Written by the indexing model from the issue text.