ext/standard: Fix Io\Poll timeouts longer than INT_MAX milliseconds

[nicolas-grekas]

Also found while building an Io\Poll driver for revolt/event-loop, unrelated to #23791.

php_poll_timespec_to_ms() casts tv_sec * 1000 to an int, so a timeout of more than about 24 days wraps around and wait() returns almost at once:

$ctx = new Io\Poll\Context(Io\Poll\Backend::Poll);
$ctx->add(new StreamPollHandle($socket), [Io\Poll\Event::Read]);
$ctx->wait(Time\Duration::fromSeconds(158913790)); // five years, returns empty after 50ms

The value is capped at INT_MAX now. This hits the poll and WSAPoll backends, and epoll only where it falls back to epoll_wait(), since epoll_pwait2() takes the timespec as is.

A timeout beyond 24 days still ends early, without any event, which is what the other users of that helper already assume. Waiting the whole duration would mean looping in each backend, tell me if you would rather have that.