### 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 (slice == "or_greater") {
				hint.or_greater = true;
			} else if (slice == "or_less") {
				hint.or_less = true;
			} else if (slice == "hide_slider") {
				hint.hide_slider = true;
			} else if (slice == "exp") {
				hint.exp_range = true;
			}
		}
	}
	bool degrees = false;
	for (int i = 0; i < slices.size(); i++) {
		String slice = slices[i].strip_edges();
		if (slice == "radians") {
			hint.radians = true;
		} else if (slice == "degrees") {
			degrees = true;
		} else if (slice.begins_with("suffix:")) {
			hint.suffix = " " + slice.replace_first("suffix:", "").strip_edges();
		}
	}
	if ((hint.radians || degrees) && hint.suffix.is_empty()) {
		hint.suffix = U"\u00B0";
	}
	ERR_FAIL_COND_V_MSG(hint.step == 0, hint,
			vformat("Invalid PROPERTY_HINT_RANGE with hint \"%s\": Step cannot be 0.", p_hint_text));
	return hint;
}
EditorProperty *EditorInspectorDefaultPlugin::get_editor_for_property(Object *p_object, const Variant::Type p_type, const String &p_path, const PropertyHint p_hint, const String &p_hint_text, const BitField<PropertyUsageFlags> p_usage, const bool p_wide) {