### 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.
}
	reset_extents(suite, current);
	int error_count = 0;
	do {
		if (!multiline && previous.type == GDScriptTokenizer::Token::SEMICOLON && check(GDScriptTokenizer::Token::NEWLINE)) {
			break;
		}
		Node *statement = parse_statement();
		if (statement == nullptr) {
			if (error_count++ > 100) {
				push_error("Too many statement errors.", suite);
				break;
			}
			continue;
		}
		suite->statements.push_back(statement);
		
		switch (statement->type) {
			case Node::VARIABLE: {
				VariableNode *variable = static_cast<VariableNode *>(statement);
				const SuiteNode::Local &local = current_suite->get_local(variable->identifier->name);
				if (local.type != SuiteNode::Local::UNDEFINED) {
					push_error(vformat(R"(There is already a %s named "%s" declared in this scope.)", local.get_name(), variable->identifier->name), variable->identifier);
				}
				current_suite->add_local(variable, current_function);
				break;
			}
			case Node::CONSTANT: {
				ConstantNode *constant = static_cast<ConstantNode *>(statement);
				const SuiteNode::Local &local = current_suite->get_local(constant->identifier->name);