### Godot version

4.0.beta13 (caacade56)

### System information

Windows 10

### Issue description

Seems like this was missed in #62011 and #70540. `@export_multiline` should also support the PackedStringArray datatype on top of Array[String] and Dictionary, but it doesn't, instead giving the error `"@export_multiline" annotation requires a variable of type "String" but type "PackedStringArray" was given instead.`

### Steps to reproduce

Create a PackedStringArray with the `@export_multiline` annotation.
```gdscript
@export_multiline var npc_dialog: PackedStringArray
```

### Minimal reproduction project

N/A
if (i == amount) {
				PanelContainer *pc = memnew(PanelContainer);
				property_vbox->add_child(pc);
				pc->add_theme_style_override(SNAME("panel"), get_theme_stylebox(SNAME("DictionaryAddItem"), SNAME("EditorStyles")));
				add_vbox = memnew(VBoxContainer);
				pc->add_child(add_vbox);
			}
			prop->set_object_and_property(object.ptr(), prop_name);
			int change_index = 0;
			if (i < amount) {
				String cs = key.get_construct_string();
				prop->set_label(key.get_construct_string());
				prop->set_tooltip_text(cs);
				change_index = i + offset;
			} else if (i == amount) {
				prop->set_label(TTR("New Key:"));
				change_index = -1;
			} else if (i == amount + 1) {
				prop->set_label(TTR("New Value:"));
				change_index = -2;
			}
			prop->set_selectable(false);
			prop->connect("property_changed", callable_mp(this, &EditorPropertyDictionary::_property_changed));
			prop->connect("object_id_selected", callable_mp(this, &EditorPropertyDictionary::_object_id_selected));
			HBoxContainer *hbox = memnew(HBoxContainer);
			if (add_vbox) {
				add_vbox->add_child(hbox);
			} else {
				property_vbox->add_child(hbox);
			}