Rework the core of class parsing/runtime semantic (#3598)

Changes:
 - Use the pre-scanner to provide information for the parser about the existence of the class constructor
 - The allocation of the super declarative environment is no longer needed
 - The VM frame context holds the information about the this binding status
 - Reduce the number of class related VM/CBC instructions
 - Improve ecma_op_function_{construct, call} to properly set new.target

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

jerry-core/ecma/builtin-objects/ecma-builtin-reflect.c

@@ -205,10 +205,8 @@ ecma_builtin_reflect_dispatch_routine (uint16_t builtin_routine_id, /**< built-i
       return ECMA_VALUE_ERROR;
     }
 
-    // TODO: add new_target_p to construct when it'll be supported
-    JERRY_UNUSED (new_target_p);
     ecma_value_t ret_value = ecma_op_function_construct (target_p,
-                                                         ECMA_VALUE_UNDEFINED,
+                                                         new_target_p,
                                                          coll_p->buffer_p,
                                                          coll_p->item_count);