### 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.
}
					push_error(vformat(R"(There is already a %s named "%s" declared in this scope.)", name, constant->identifier->name), constant->identifier);
				}
				current_suite->add_local(constant, current_function);
				break;
			}
			default:
				break;
		}
	} while ((multiline || previous.type == GDScriptTokenizer::Token::SEMICOLON) && !check(GDScriptTokenizer::Token::DEDENT) && !lambda_ended && !is_at_end());
	complete_extents(suite);
	if (multiline) {
		if (!lambda_ended) {
			consume(GDScriptTokenizer::Token::DEDENT, vformat(R"(Missing unindent at the end of %s.)", p_context));
		} else {
			match(GDScriptTokenizer::Token::DEDENT);
		}
	} else if (previous.type == GDScriptTokenizer::Token::SEMICOLON) {
		consume(GDScriptTokenizer::Token::NEWLINE, vformat(R"(Expected newline after ";" at the end of %s.)", p_context));
	}
	if (p_for_lambda) {
		lambda_ended = true;
	}
	current_suite = suite->parent_block;
	return suite;
}
GDScriptParser::Node *GDScriptParser::parse_statement() {
	Node *result = nullptr;
#ifdef DEBUG_ENABLED
	bool unreachable = current_suite->has_return && !current_suite->has_unreachable_code;