### Godot version

v4.0.beta13.official [caacade56]

### System information

Windows 8.1

### Issue description

The `Unreachable code (statement after return) in function 'function_name()'` warning is given for functions that do not have unreachable code. The same code does not give this warning in v3.5.stable.official [991bb6ac7].

### Steps to reproduce

```
func warning(i: int) -> void:
  if i == 0:
    pass
  elif i == 1:
    return
  else:
    return
  print("yeah")
```

Removing either the `elif` or the `else` removes the warning.

### Minimal reproduction project

N/A; code in reproduction steps can be placed in any blank gdscript file to trigger the error.
ERR_FAIL_COND_V_MSG(!valid_annotations.has(p_annotation->name), false, vformat(R"(Annotation "%s" not found to validate.)", p_annotation->name));
	const MethodInfo &info = valid_annotations[p_annotation->name].info;
	if (((info.flags & METHOD_FLAG_VARARG) == 0) && p_annotation->arguments.size() > info.arguments.size()) {
		push_error(vformat(R"(Annotation "%s" requires at most %d arguments, but %d were given.)", p_annotation->name, info.arguments.size(), p_annotation->arguments.size()));
		return false;
	}
	if (p_annotation->arguments.size() < info.arguments.size() - info.default_arguments.size()) {
		push_error(vformat(R"(Annotation "%s" requires at least %d arguments, but %d were given.)", p_annotation->name, info.arguments.size() - info.default_arguments.size(), p_annotation->arguments.size()));
		return false;
	}
	
	if (p_annotation->name == SNAME("@icon")) {
		ExpressionNode *argument = p_annotation->arguments[0];
		if (argument->type != Node::LITERAL) {
			push_error(R"(Argument 1 of annotation "@icon" must be a string literal.)", argument);
			return false;
		}
		Variant value = static_cast<LiteralNode *>(argument)->value;
		if (value.get_type() != Variant::STRING) {
			push_error(R"(Argument 1 of annotation "@icon" must be a string literal.)", argument);
			return false;
		}
		p_annotation->resolved_arguments.push_back(value);
	}
	
	return true;
}
bool GDScriptParser::tool_annotation(const AnnotationNode *p_annotation, Node *p_node) {