[datafusion-spark]: Implement collect_list/array_agg #17923

Is your feature request related to a problem or challenge?

Implement collect_list, array_agg equivalent of spark.

Note that in Spark, the array_agg is an alias of collect_list, link here.

Also note that, Datafusion also support array_agg, however, there seems to a difference in behaviour and syntax with Spark.

For eg. Datafusion support ORDER BY within array_agg, link, and can provide deterministic ordering. Spark on the other hand, doesn't support ORDER BY within array_agg and does not ensure deterministic ordering. Spark doc explicitly mentions this for all 2 functions - The function is non-deterministic because the order of collected results depends on the order of the rows which may be non-deterministic after a shuffle., link.

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