### 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
float rel = mm->get_relative().x;
		if (rel == 0) {
			return;
		}
		if (flip) {
			rel = -rel;
		}
		float val = get_edited_object()->get(get_edited_property());
		bool sg = val < 0;
		val = Math::absf(val);
		val = Math::log(val) / Math::log((float)2.0);
		
		val += rel * 0.05;
		val = Math::pow(2.0f, val);
		if (sg) {
			val = -val;
		}
		
		
		if (Math::is_zero_approx(val)) {
			val = 0.00001;
		}
		
		
		val = CLAMP(val, -1'000'000, 1'000'000);
		emit_changed(get_edited_property(), val);
		easing_draw->queue_redraw();
	}
}
void EditorPropertyEasing::_draw_easing() {