### 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.
switch (p_variable->property) {
		case VariableNode::PROP_INLINE: {
			FunctionNode *function = alloc_node<FunctionNode>();
			consume(GDScriptTokenizer::Token::COLON, R"(Expected ":" after "get".)");
			IdentifierNode *identifier = alloc_node<IdentifierNode>();
			complete_extents(identifier);
			identifier->name = "@" + p_variable->identifier->name + "_getter";
			function->identifier = identifier;
			FunctionNode *previous_function = current_function;
			current_function = function;
			SuiteNode *body = alloc_node<SuiteNode>();
			function->body = parse_suite("getter declaration", body);
			p_variable->getter = function;
			current_function = previous_function;
			complete_extents(function);
			break;
		}
		case VariableNode::PROP_SETGET:
			consume(GDScriptTokenizer::Token::EQUAL, R"(Expected "=" after "get")");
			make_completion_context(COMPLETION_PROPERTY_METHOD, p_variable);
			if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected getter function name after "=".)")) {
				p_variable->getter_pointer = parse_identifier();
			}
			break;
		case VariableNode::PROP_NONE:
			break; 
	}
}
GDScriptParser::ConstantNode *GDScriptParser::parse_constant() {