Implement `array_aggregate` function

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

## Summary

| Characteristic | Description |
| --------------------- | ------------------------------------------------------------------------------------------------------------------------------ |
| Function name: | `array_aggregate` |
| Aliases: | `list_aggregate`, `array_aggr`, `list_aggr` |
| Original function?: | No |
| Function Description: | DuckDB: Executes the aggregate function name on the elements of list. See the List Aggregates section for more details. |
| Sources: | [Concept](https://github.com/apache/arrow-datafusion/discussions/6855) [DuckDB](https://duckdb.org/docs/sql/functions/nested) |

## Examples:

```
D select list_aggregate([1, 2, NULL], 'min');
┌────────────────────────────────────────────────────┐
│ list_aggregate(main.list_value(1, 2, NULL), 'min') │
│ int32 │
├────────────────────────────────────────────────────┤
│ 1 │
└────────────────────────────────────────────────────┘
```

```
D select list_aggregate([1, 3, NULL, 5], 'sum');
┌───────────────────────────────────────────────────────┐
│ list_aggregate(main.list_value(1, 3, NULL, 5), 'sum') │
│ int128 │
├───────────────────────────────────────────────────────┤
│ 9 │
└───────────────────────────────────────────────────────┘
```

### Describe the solution you'd like

_No response_

### Describe alternatives you've considered

_No response_

### Additional context

_No response_

No implementation files or test paths are named in the issue. Start by locating DataFusion's existing list functions and aggregate-function tests, then compare the requested aliases and DuckDB examples; done means array_aggregate and its listed aliases execute named aggregates over list elements with the shown NULL behavior.

Written by the indexing model from the issue text.