[Feature] get where "exit" was called/shutdown started

Description

There currently is no simple way to figure out what/where exit was called.

Since PHP 8.4 PHP is a proper function, however it seems it's xdebug won't break on it, even if set (besides the fact, there's tons of bugs with IDEs/xdebug when breaking on built-in functions, e.g. defined()

Stepping through the code until exit; is reached isn't feasible in all cases (it happens in a long running process, this might take a day...)

It would be great if there were a magic constant similar to __COMPILER_HALT_OFFSET__ that is available in shutdown function callbacks, which includes the last executed file + line in the main thread before shutdown started. But that's just a simple first suggestion, I'm open to everything that makes identifying/debugging this easier.

El issue no menciona archivos, pruebas ni puntos de entrada de la implementación. Empieza rastreando cómo se gestionan los callbacks de las funciones exit y shutdown en el intérprete de PHP y, a continuación, define una forma viable de exponer el último archivo y la última línea ejecutados; se considera terminado cuando el comportamiento está especificado, implementado y cubierto por pruebas.