Rework Object's [[OwnPropertyKeys]] (#4001)

I've removed the ecma_op_object_get_property_names method, and implemented the following ones:
- ecma_op_object_own_property_keys: this is now the internal [[OwnPropertyKeys]] method
- ecma_op_object_enumerate: this is used for the for-in iterator
- ecma_object_sort_property_names: this is used for sorting the property names of an object
- ecma_object_list_lazy_property_names: this is for getting the lazy instantiated properties
- ecma_object_prop_name_is_duplicated: this is for checking if a given property is duplicated in an object

Also the for-in operation with Proxy object works with this patch, #3992 should be closed

JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu

jerry-core/ecma/base/ecma-globals.h

@@ -1431,7 +1431,7 @@ typedef struct
  * Compute the total allocated size of the collection based on it's capacity
  */
 #define ECMA_COLLECTION_ALLOCATED_SIZE(capacity) \
-  (uint32_t) (sizeof (ecma_collection_t) + (capacity * sizeof (ecma_value_t)))
+  (uint32_t) (capacity * sizeof (ecma_value_t))
 
 /**
  * Initial allocated size of an ecma-collection
@@ -2066,6 +2066,17 @@ typedef struct
 } ecma_revocable_proxy_object_t;
 #endif /* ENABLED (JERRY_BUILTIN_PROXY) */
 
+/**
+ * Struct for counting the different types properties in objects
+ */
+typedef struct
+{
+  uint32_t array_index_named_props; /**< number of array index named properties */
+  uint32_t string_named_props; /**< number of string named properties */
+  uint32_t symbol_named_props; /**< number of symbol named properties */
+  uint32_t lazy_string_named_props; /**< number of lazy instantiated properties */
+} ecma_property_counter_t;
+
 /**
  * @}
  * @}