### 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 (resource_picker) {
		memdelete(resource_picker);
		resource_picker = nullptr;
	}
	if (p_path == "script" && p_base_type == "Script" && Object::cast_to<Node>(p_object)) {
		EditorScriptPicker *script_picker = memnew(EditorScriptPicker);
		script_picker->set_script_owner(Object::cast_to<Node>(p_object));
		resource_picker = script_picker;
	} else if (p_path == "shader" && p_base_type == "Shader" && Object::cast_to<ShaderMaterial>(p_object)) {
		EditorShaderPicker *shader_picker = memnew(EditorShaderPicker);
		shader_picker->set_edited_material(Object::cast_to<ShaderMaterial>(p_object));
		resource_picker = shader_picker;
		connect(SNAME("ready"), callable_mp(this, &EditorPropertyResource::_update_preferred_shader));
	} else if (p_base_type == "AudioStream") {
		EditorAudioStreamPicker *astream_picker = memnew(EditorAudioStreamPicker);
		resource_picker = astream_picker;
	} else {
		resource_picker = memnew(EditorResourcePicker);
	}
	resource_picker->set_base_type(p_base_type);
	resource_picker->set_editable(true);
	resource_picker->set_h_size_flags(SIZE_EXPAND_FILL);
	add_child(resource_picker);
	resource_picker->connect("resource_selected", callable_mp(this, &EditorPropertyResource::_resource_selected));
	resource_picker->connect("resource_changed", callable_mp(this, &EditorPropertyResource::_resource_changed));
	for (int i = 0; i < resource_picker->get_child_count(); i++) {
		Button *b = Object::cast_to<Button>(resource_picker->get_child(i));
		if (b) {
			add_focusable(b);
		}