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/operations/ecma-proxy-object.h

@@ -106,9 +106,9 @@ ecma_proxy_object_call (ecma_object_t *obj_p,
 
 ecma_value_t
 ecma_proxy_object_construct (ecma_object_t *obj_p,
+                             ecma_object_t *new_target_p,
                              const ecma_value_t *args_p,
-                             ecma_length_t argc,
-                             ecma_value_t new_target);
+                             ecma_length_t argc);
 
 #endif /* ENABLED (JERRY_ES2015_BUILTIN_PROXY) */