[pick](cast)Feature cast complexttype2 json (#38632)

## Proposed changes
backport: https://github.com/apache/doris/pull/36548
Issue Number: close #xxx

<!--Describe your changes.-->

fe/fe-common/src/main/java/org/apache/doris/catalog/Type.java

@@ -833,6 +833,9 @@ public abstract class Type {
     }
 
     public static boolean canCastTo(Type sourceType, Type targetType) {
+        if (targetType.isJsonbType() && sourceType.isComplexType()) {
+            return true;
+        }
         if (sourceType.isVariantType() && (targetType.isScalarType() || targetType.isArrayType())) {
             // variant could cast to scalar types and array
             return true;