### 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.
MatchBranchNode *branch = alloc_node<MatchBranchNode>();
	reset_extents(branch, current);
	bool has_bind = false;
	do {
		PatternNode *pattern = parse_match_pattern();
		if (pattern == nullptr) {
			continue;
		}
		if (pattern->binds.size() > 0) {
			has_bind = true;
		}
		if (branch->patterns.size() > 0 && has_bind) {
			push_error(R"(Cannot use a variable bind with multiple patterns.)");
		}
		if (pattern->pattern_type == PatternNode::PT_REST) {
			push_error(R"(Rest pattern can only be used inside array and dictionary patterns.)");
		} else if (pattern->pattern_type == PatternNode::PT_BIND || pattern->pattern_type == PatternNode::PT_WILDCARD) {
			branch->has_wildcard = true;
		}
		branch->patterns.push_back(pattern);
	} while (match(GDScriptTokenizer::Token::COMMA));
	if (branch->patterns.is_empty()) {
		push_error(R"(No pattern found for "match" branch.)");
	}
	if (!consume(GDScriptTokenizer::Token::COLON, R"(Expected ":" after "match" patterns.)")) {
		complete_extents(branch);
		return nullptr;
	}
	SuiteNode *suite = alloc_node<SuiteNode>();
	if (branch->patterns.size() > 0) {