[php-src] PR #23841: sapi/cli: Make the Expect 100-continue abort test wait for the connec…

Pull Request: https://github.com/php/php-src/pull/23841 Author: devnexen …tion The test resets the connection as soon as it is opened, so the reset could reach the server while the connection was still in the listen backlog. The server then never saw the request and the expected error was never logged. Complete a request on a second connection first: the accept queue is FIFO, so a response on the later connection means the earlier one has been accepted, and the reset is guaranteed to hit an established connection.