[php-src] PR #24205: ext/standard: Hold argv while getopt() converts its entries

Pull Request: https://github.com/php/php-src/pull/24205 Author: iliaal getopt() iterates $argv in place while converting each entry to a string, so a __toString() that modifies or unsets $argv resizes or frees the hash under the iteration; valgrind shows invalid reads in zif_getopt on 8.4. The array is now held for the duration of the loop, so such writes separate it, and the hold is released with GC_TRY_DTOR_NO_REF() so an unset $argv that is part of a cycle stays collectable. The long options array is passed by value, so it was already protected.