### 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
GridContainer *g = memnew(GridContainer);
	g->set_columns(p_include_origin ? 3 : 2);
	add_child(g);
	static const char *desc[6] = { "xx", "xy", "xo", "yx", "yy", "yo" };
	for (int i = 0; i < 6; i++) {
		spin[i] = memnew(EditorSpinSlider);
		spin[i]->set_label(desc[i]);
		spin[i]->set_flat(true);
		if (p_include_origin || i % 3 != 2) {
			g->add_child(spin[i]);
		}
		spin[i]->set_h_size_flags(SIZE_EXPAND_FILL);
		add_focusable(spin[i]);
		spin[i]->connect("value_changed", callable_mp(this, &EditorPropertyTransform2D::_value_changed).bind(desc[i]));
	}
	set_bottom_editor(g);
}
void EditorPropertyBasis::_set_read_only(bool p_read_only) {