feat: Add array_min function support

[erenavsarogullari]

Which issue does this PR close?

Closes #14416.

What changes are included in this PR?

Currently, Spark, Snowflake and Presto support array_min function. This can also be useful for DataFusion.

array_min(make_array(3,1,4,2)) => 1
array_min(make_array('h','e','l','l',NULL,'o')) => e
array_min(make_array(NULL,NULL)) => NULL

Spark: https://docs.databricks.com/en/sql/language-manual/functions/array_min.html
Snowflake: https://docs.snowflake.com/en/sql-reference/functions/array_min
Presto: https://prestodb.io/docs/current/functions/array.html#array_min-x-x

All potential use-cases have been covered like different data_types, empty array, NULL etc.

Also, planning to add array_max function as follow-up.

Are these changes tested?

Added new UT cases to verify array_min function in terms of different source arrays.

Are there any user-facing changes?

Yes, new SQL function is supported and documentation has also be updated.