[php-src] PR #23553: ext/pcntl: fix an off by one bound and a parameter the parser made required

Pull Request: https://github.com/php/php-src/pull/23553 Author: lacatoire Two unrelated slips in ext/pcntl/pcntl.c, together because they touch the same file. pcntl_setcpuaffinity() rejects cpu >= maxcpus but advertises maxcpus as the inclusive upper bound, so on a 16-CPU host id 16 is refused by a message saying "between 0 and 16". It now prints maxcpus - 1. The same line printed maxcpus, a zend_long, with ZEND_ULONG_FMT; corrected to ZEND_LONG_FMT, since sysconf() can return -1. pcntl_setqos_class() declares $qos_class optional with a default of Pcntl\QosClass::Default, but its ZPP block was (1, 1) and qos was left uninitialised, so calling it with no argument raised an ArgumentCountError and the declared default was unreachable. It now parses (0, 1) with Z_PARAM_OPTIONAL and initialises qos beforehand, as bcround() does for its optional enum parameter. This half is macOS-only and could not be exercised here. The new test reads the bound out of the message rather than hardcoding a cpu count, then checks that the advertised bound is accepted and the next id refused; it fails on the current code. Master only, as the exception message changes.