### 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.
for (int i = 0; i < 2; i++) {
		if (function->name == SNAME("set")) {
			if (setter_used) {
				push_error(R"(Properties can only have one setter.)");
			} else {
				parse_property_setter(property);
				setter_used = true;
			}
		} else if (function->name == SNAME("get")) {
			if (getter_used) {
				push_error(R"(Properties can only have one getter.)");
			} else {
				parse_property_getter(property);
				getter_used = true;
			}
		} else {
			
			push_error(R"(Expected "get" or "set" for property declaration.)");
		}
		if (i == 0 && p_variable->property == VariableNode::PROP_SETGET) {
			if (match(GDScriptTokenizer::Token::COMMA)) {
				
				if (match(GDScriptTokenizer::Token::NEWLINE)) {
					if (!p_need_indent) {
						push_error(R"(Inline setter/getter setting cannot span across multiple lines (use "\\"" if needed).)");
					}
				}
			} else {
				break;