### 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.
}
	pop_completion_call();
	pop_multiline();
	consume(GDScriptTokenizer::Token::PARENTHESIS_CLOSE, R"*(Expected ")" after preload path.)*");
	complete_extents(preload);
	return preload;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_lambda(ExpressionNode *p_previous_operand, bool p_can_assign) {
	LambdaNode *lambda = alloc_node<LambdaNode>();
	lambda->parent_function = current_function;
	FunctionNode *function = alloc_node<FunctionNode>();
	function->source_lambda = lambda;
	function->is_static = current_function != nullptr ? current_function->is_static : false;
	if (match(GDScriptTokenizer::Token::IDENTIFIER)) {
		function->identifier = parse_identifier();
	}
	bool multiline_context = multiline_stack.back()->get();
	
	push_multiline(false);
	if (multiline_context) {
		tokenizer.push_expression_indented_block();
	}
	push_multiline(true); 
	if (function->identifier) {
		consume(GDScriptTokenizer::Token::PARENTHESIS_OPEN, R"(Expected opening "(" after lambda name.)");
	} else {
		consume(GDScriptTokenizer::Token::PARENTHESIS_OPEN, R"(Expected opening "(" after "func".)");
	}
	FunctionNode *previous_function = current_function;
	current_function = function;