ini_get() is optimized out when the option does not exist

### Description

The following code:

```php
<?php

dl("dl_test.so");

var_dump(ini_get("test_test.long"));
```

Resulted in this output:
```
bool(false)
```

But I expected this output instead:
```
string(1) "0"
```

This happens when opcache is enabled.

### PHP Version

PHP 8.1

### Operating System

_No response_