[php-src] Issue #11750: Non-persistent MySQL connections are not being closed in Cacti.

Issue: https://github.com/php/php-src/issues/11750 Author: elyograg ### Description I have been investigating a problem with Cacti where it opens a new database connection on every 5 minute poll interval, and never closes them, eventually running the DB server out of connections, even with the max_connections set to 1000. It is a new install of Cacti, I am not upgrading. Eventually I figured out that configuring Cacti to use persistent database connections solved the issue. So there is a workaround. I am seeing the biggest problem with the long-running daemons, one for cacti itself called cactid, the other for a cacti plugin called flowview. The service for that one is called "flow-capture". The cacti project is claiming that they have never had to worry about closing connections before and they think something probably changed in PDO. This is the issue I opened on Cacti for the problem: https://github.com/Cacti/cacti/issues/5401 ### PHP Version PHP 8.1.2-1ubuntu2.13 ### Operating System Ubuntu 22.04