### 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
bool horizontal = EDITOR_GET("interface/inspector/horizontal_vector_types_editing");
	BoxContainer *bc;
	if (horizontal) {
		bc = memnew(HBoxContainer);
		add_child(bc);
		set_bottom_editor(bc);
	} else {
		bc = memnew(VBoxContainer);
		add_child(bc);
	}
	static const char *desc[4] = { "x", "y", "z", "w" };
	for (int i = 0; i < 4; i++) {
		spin[i] = memnew(EditorSpinSlider);
		spin[i]->set_flat(true);
		spin[i]->set_label(desc[i]);
		bc->add_child(spin[i]);
		add_focusable(spin[i]);
		spin[i]->connect("value_changed", callable_mp(this, &EditorPropertyVector4::_value_changed).bind(desc[i]));
		if (horizontal) {
			spin[i]->set_h_size_flags(SIZE_EXPAND_FILL);
		}
	}
	if (!horizontal) {
		set_label_reference(spin[0]); 
	}
}
void EditorPropertyVector4i::_set_read_only(bool p_read_only) {