### Godot version

4.2 247c354

### System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

### Issue description

#75778 exposed `_validate_property()` to scripting. It's implemented in GDScript and C#, but not GDExtension (depends on #78634).
https://github.com/godotengine/godot/blob/247c3548d810136ffe9c1694cd76db3236efaa90/core/object/script_language_extension.h#L685-L687

Relevant discussion: https://github.com/godotengine/godot/pull/75778#discussion_r1307294940

### Steps to reproduce

1. Add GDExtension script
2. Use `_validate_property()`

### Minimal reproduction project

N/A
REGISTER_INTERFACE_FUNC(string_operator_plus_eq_wcstr);
	REGISTER_INTERFACE_FUNC(string_operator_plus_eq_c32str);
	REGISTER_INTERFACE_FUNC(string_resize);
	REGISTER_INTERFACE_FUNC(xml_parser_open_buffer);
	REGISTER_INTERFACE_FUNC(file_access_store_buffer);
	REGISTER_INTERFACE_FUNC(file_access_get_buffer);
	REGISTER_INTERFACE_FUNC(worker_thread_pool_add_native_group_task);
	REGISTER_INTERFACE_FUNC(worker_thread_pool_add_native_task);
	REGISTER_INTERFACE_FUNC(packed_byte_array_operator_index);
	REGISTER_INTERFACE_FUNC(packed_byte_array_operator_index_const);
	REGISTER_INTERFACE_FUNC(packed_color_array_operator_index);
	REGISTER_INTERFACE_FUNC(packed_color_array_operator_index_const);
	REGISTER_INTERFACE_FUNC(packed_float32_array_operator_index);
	REGISTER_INTERFACE_FUNC(packed_float32_array_operator_index_const);
	REGISTER_INTERFACE_FUNC(packed_float64_array_operator_index);
	REGISTER_INTERFACE_FUNC(packed_float64_array_operator_index_const);
	REGISTER_INTERFACE_FUNC(packed_int32_array_operator_index);
	REGISTER_INTERFACE_FUNC(packed_int32_array_operator_index_const);
	REGISTER_INTERFACE_FUNC(packed_int64_array_operator_index);
	REGISTER_INTERFACE_FUNC(packed_int64_array_operator_index_const);
	REGISTER_INTERFACE_FUNC(packed_string_array_operator_index);
	REGISTER_INTERFACE_FUNC(packed_string_array_operator_index_const);
	REGISTER_INTERFACE_FUNC(packed_vector2_array_operator_index);
	REGISTER_INTERFACE_FUNC(packed_vector2_array_operator_index_const);
	REGISTER_INTERFACE_FUNC(packed_vector3_array_operator_index);
	REGISTER_INTERFACE_FUNC(packed_vector3_array_operator_index_const);
	REGISTER_INTERFACE_FUNC(array_operator_index);
	REGISTER_INTERFACE_FUNC(array_operator_index_const);
	REGISTER_INTERFACE_FUNC(array_ref);
	REGISTER_INTERFACE_FUNC(array_set_typed);