### 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
switch (v.get_type()) {
		case Variant::ARRAY: {
			Array a = v;
			for (int i = 0; i < a.size(); i++) {
				Variant v2 = a[i];
				if (v2.get_type() != Variant::ARRAY && v2.get_type() != Variant::DICTIONARY && v2.get_type() != Variant::OBJECT) {
					continue;
				}
				if (_find_recursive_resources(v2, resources_found)) {
					return true;
				}
			}
		} break;
		case Variant::DICTIONARY: {
			Dictionary d = v;
			List<Variant> keys;
			d.get_key_list(&keys);
			for (const Variant &k : keys) {
				if (k.get_type() == Variant::ARRAY || k.get_type() == Variant::DICTIONARY || k.get_type() == Variant::OBJECT) {
					if (_find_recursive_resources(k, resources_found)) {
						return true;