Add support of array of objects in CHECKCAST

tests/test_data/TrivialCast.java

@@ -12,6 +12,9 @@ public static void main(String[] args) {
         Object o2 = new long[] { 1, 2, 3 };
         var longArray = (long[]) o2;
 
+        Object o3 = new String[10];
+        var stringArray = (String[]) o3;
+
         int result = 1337;
     }
 }

vm/src/execution_engine/engine.rs

@@ -1513,6 +1513,7 @@ impl Engine {
                                 "Error getting class name by index {class_constpool_index}"
                             ))
                         })?;
+                    let class_of_array = format!("[L{class_of_array};");
                     let arrayref =
                         with_heap_write_lock(|heap| heap.create_array(&class_of_array, length));
                     stack_frame.push(arrayref);