### 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
decrease_indent();
			}
		}
	}
	decrease_indent();
	push_line();
}
void GDScriptParser::TreePrinter::print_while(WhileNode *p_while) {
	push_text("While ");
	print_expression(p_while->condition);
	push_line(" :");
	increase_indent();
	print_suite(p_while->loop);
	decrease_indent();
}
void GDScriptParser::TreePrinter::print_tree(const GDScriptParser &p_parser) {
	ERR_FAIL_COND_MSG(p_parser.get_tree() == nullptr, "Parse the code before printing the parse tree.");
	if (p_parser.is_tool()) {
		push_line("@tool");
	}
	if (!p_parser.get_tree()->icon_path.is_empty()) {
		push_text(R"(@icon (")");
		push_text(p_parser.get_tree()->icon_path);
		push_line("\")");
	}
	print_class(p_parser.get_tree());
	print_line(String(printed));
}
#endif