Added UUID Specializations in if Statement

Why it matters

This feature addresses the limitation where the if function did not support UUID data types, allowing users to write conditional logic that directly manipulates UUID values without needing workarounds or type conversions.

How to use it

Users can now write conditional expressions using the if function with UUID arguments as usual, for example:

SELECT if(condition, uuid_value_if_true, uuid_value_if_false) FROM table;

This requires no special configuration or settings.