### 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 (p_what) {
		case NOTIFICATION_THEME_CHANGED:
		case NOTIFICATION_ENTER_TREE: {
			Ref<Texture2D> df = get_theme_icon(SNAME("DistractionFree"), SNAME("EditorIcons"));
			open_big_text->set_icon(df);
			Ref<Font> font;
			int font_size;
			if (expression) {
				font = get_theme_font(SNAME("expression"), SNAME("EditorFonts"));
				font_size = get_theme_font_size(SNAME("expression_size"), SNAME("EditorFonts"));
				text->add_theme_font_override("font", font);
				text->add_theme_font_size_override("font_size", font_size);
				if (big_text) {
					big_text->add_theme_font_override("font", font);
					big_text->add_theme_font_size_override("font_size", font_size);
				}
			} else {
				font = get_theme_font(SNAME("font"), SNAME("TextEdit"));
				font_size = get_theme_font_size(SNAME("font_size"), SNAME("TextEdit"));
			}
			text->set_custom_minimum_size(Vector2(0, font->get_height(font_size) * 6));
		} break;
	}
}
void EditorPropertyMultilineText::_bind_methods() {