### 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
uint32_t value = get_edited_object()->get(get_edited_property());
	for (int i = 0; i < flags.size(); i++) {
		flags[i]->set_pressed((value & flag_values[i]) == flag_values[i]);
	}
}
void EditorPropertyFlags::setup(const Vector<String> &p_options) {
	ERR_FAIL_COND(flags.size());
	bool first = true;
	uint32_t current_val;
	for (int i = 0; i < p_options.size(); i++) {
		
		String option = p_options[i].strip_edges();
		if (option.is_empty()) {
			continue;
		}
		const int flag_index = flags.size(); 
		
		Vector<String> text_split = p_options[i].split(":");
		if (text_split.size() != 1) {
			current_val = text_split[1].to_int();
		} else {
			current_val = 1 << i;
		}
		flag_values.push_back(current_val);
		
		CheckBox *cb = memnew(CheckBox);
		cb->set_text(option);
		cb->set_clip_text(true);