8002099: Add support for intersection types in cast expression

Add parser and type-checking support for intersection types in cast expressions

Reviewed-by: jjg

langtools/src/share/classes/com/sun/source/tree/Tree.java

@@ -246,6 +246,11 @@ public interface Tree {
          */
         UNION_TYPE(UnionTypeTree.class),
 
+        /**
+         * Used for instances of {@link IntersectionTypeTree}.
+         */
+        INTERSECTION_TYPE(IntersectionTypeTree.class),
+
         /**
          * Used for instances of {@link TypeCastTree}.
          */