[php-src] Issue #12812: JIT: Integer string in variable used as offset produces wrong undefined array key warning

Issue: https://github.com/php/php-src/issues/12812 Author: Girgias ### Description Found while working on #12723 The following code: ```php <?php $container = []; $dimension = '7'; try { var_dump($container['7']); } catch (\Throwable $e) { echo $e->getMessage(), "\n"; } try { var_dump($container[$dimension]); } catch (\Throwable $e) { echo $e->getMessage(), "\n"; } ``` Resulted in this output: ``` Warning: Undefined array key 7 in %s on line %d NULL Warning: Undefined array key "7" in %s on line %d NULL ``` But I expected this output instead: ``` Warning: Undefined array key 7 in %s on line %d NULL Warning: Undefined array key 7 in %s on line %d NULL ``` ### PHP Version PHP 8.2 ### Operating System _No response_