Add support for Utf8View to string_to_array and array_to_string (#13403)

* Directly support utf8view in array_to_string & string_to_array. #13383

* Update to have output data type match input data type.

* Return type cleanup.

* Updated to properly handle returning largeutf8 + code refactor and a few more tests.

Author: Omega359

datafusion/expr-common/src/signature.rs

@@ -131,7 +131,7 @@ pub enum TypeSignature {
     Numeric(usize),
     /// Fixed number of arguments of all the same string types.
     /// The precedence of type from high to low is Utf8View, LargeUtf8 and Utf8.
-    /// Null is considerd as `Utf8` by default
+    /// Null is considered as `Utf8` by default
     /// Dictionary with string value type is also handled.
     String(usize),
     /// Zero argument