### 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
for (int i = 0; i < 4; i++) {
		spin[i]->set_read_only(p_read_only);
	}
	for (int i = 0; i < 3; i++) {
		euler[i]->set_read_only(p_read_only);
	}
}
void EditorPropertyQuaternion::_edit_custom_value() {
	if (edit_button->is_pressed()) {
		edit_custom_bc->show();
		for (int i = 0; i < 3; i++) {
			euler[i]->grab_focus();
		}
	} else {
		edit_custom_bc->hide();
		for (int i = 0; i < 4; i++) {
			spin[i]->grab_focus();
		}
	}
	update_property();
}
void EditorPropertyQuaternion::_custom_value_changed(double val) {