### Godot version

4.0-rc1

### System information

Windows 10

### Issue description

The code: `@export @onready var camera_system : Node3D`

Is throwing: `Line 5:The "@onready" annotation will make the default value to be set after the "@export" takes effect and will override it. (Warning treated as error.)` and is crashing the game.

Unchecking "Treat Warning as Errors" seems to have no effect:

![imagen](https://user-images.githubusercontent.com/248383/217900756-8e214c40-68fb-4fb2-8509-a1e689725930.png)

![imagen](https://user-images.githubusercontent.com/248383/217901253-3b758ebc-48e9-40fe-8d77-16fce7cbae88.png)


### Steps to reproduce

- Write `@export @onready var some_var : Node3D`
- In Project Settings, uncheck `Treat Warning as Errors`
- Try to run the project, a `Parser Error` will be thrown.

### Minimal reproduction project

It's as simple as adding one line of code, so I'm not sure a MRP is needed.
return kind == GDScriptParser::DataType::BUILTIN && _variant_type_to_typed_array_element_type(builtin_type) != Variant::NIL;
}
GDScriptParser::DataType GDScriptParser::DataType::get_typed_container_type() const {
	GDScriptParser::DataType type;
	type.kind = GDScriptParser::DataType::BUILTIN;
	type.builtin_type = _variant_type_to_typed_array_element_type(builtin_type);
	return type;
}
void GDScriptParser::complete_extents(Node *p_node) {
	while (!nodes_in_progress.is_empty() && nodes_in_progress.back()->get() != p_node) {
		ERR_PRINT("Parser bug: Mismatch in extents tracking stack.");
		nodes_in_progress.pop_back();
	}
	if (nodes_in_progress.is_empty()) {
		ERR_PRINT("Parser bug: Extents tracking stack is empty.");
	} else {
		nodes_in_progress.pop_back();
	}
}
void GDScriptParser::update_extents(Node *p_node) {