Add sort_array function

This PR adds Hive's ``sort_array`` function that sorts the given array in ascending order according to the natural ordering of its elements (only if the array elements are Comparable).
use `new FunctionInfo(signature, getDescription(), isHidden(), methodHandle, isDeterministic(), false, ImmutableList.of(false)` to make this more readable. Also, the second to last argument should be false, not true, since it can't return NULL without being passed NULL