[GIT-PULLS] [php-src] PR #22872: Use `php_pollfd_for_ms` more consistently for single fd polling

Pull Request: https://github.com/php/php-src/pull/22872
Author: NattyNarwhal

There's a few cases where we call `poll` with a single fd; we have a wrapper (`php_pollfd_for_ms`) to make this case cleaner with less boilerplate.

Side note: said wrapper also uses the `php_poll2` API, which can also emulate poll(2) using select(2); FastCGI was doing this on its own, so that also handles that case. That said, poll seems to be basically everywhere nowadays, so emulating poll is only seems useful for Windows, which has `WSAPoll`. I suspect `php_poll2` should be a `WSAPoll` wrapper instead? The new poll API handles all this of course, but seems pretty heavyweight for the case of just quickly polling a single fd.