Implement native function of `reverse`

[slfan1989]

Background and Motivation:

Currently, we do not have a native implementation of reverse that aligns with Spark SQL behavior. To improve compatibility with Spark functions and reduce dependency on UDFs, we need to implement this function, supporting string inputs.

Objective and Scope:

Add a new native scalar function: reverse(expr), supporting the following data types:

• String: Utf8, LargeUtf8
• Support for scalar and column vector (array) mixed input paths, ensuring consistent ColumnarValue behavior with existing built-in functions.
• Null semantics aligned with Spark.

Expected Behavior (Aligned with Spark):

• reverse(string): Reverse the string according to Unicode code points.