Implement array_distinct function

[izveigor]

Is your feature request related to a problem or challenge?

Summary

Characteristic	Description
Function name:	array_distinct
Aliases:	list_distinct
Original function?:	No
Function Description:	DuckDB: Removes all duplicates and NULLs from a list. Does not preserve the original order. Azure DataBricks: Removes duplicate values from array. SQL Spark: Return distinct values from the array after removing duplicates.
Sources:	Concept DuckDB Azure Spark

Examples:

D select array_distinct([1, 3, 2, 3, 1, 2, 4]);
┌──────────────────────────────────────────────────────┐
│ array_distinct(main.list_value(1, 3, 2, 3, 1, 2, 4)) │
│                       int32[]                        │
├──────────────────────────────────────────────────────┤
│ [4, 2, 3, 1]                                         │
└──────────────────────────────────────────────────────┘

D select array_distinct(['a', 'b', 'c', 'd']);
┌─────────────────────────────────────────────────────┐
│ array_distinct(main.list_value('a', 'b', 'c', 'd')) │
│                      varchar[]                      │
├─────────────────────────────────────────────────────┤
│ [b, d, c, a]                                        │
└─────────────────────────────────────────────────────┘

Describe the solution you'd like

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Describe alternatives you've considered

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Additional context

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[my-vegetable-has-exploded]

May I try this issue?

[my-vegetable-has-exploded]

Shall we preserve the original order here?