Parsing the PHP Configuration may sometimes produce errors

Fresh install logs these errors 

```
2023-06-12  15:36:39 - CMDPHP PHP ERROR WARNING Backtrace:   (/install/cli_check.php[43]:utility_php_verify_recommends(),  /lib/utility.php[1805]:CactiErrorHandler())
2023-06-12 15:36:39 - ERROR PHP WARNING: Undefined array key  "date.timezone" in file: /var/www/html/cacti/lib/utility.php  on line:  1805

```