Upgrade to PHP 8.2.3

Summary:
This is the first PHP 8.2 and PHP 8 release of the image.
PGP keys have been updated for the PHP 8.2 versions.

Bump Onigurama version too, to 6.9.8.

Reference: https://www.php.net/ChangeLog-8.php

Test Plan:

echo '<?php phpinfo();' > /tmp/www/index.php
docker run -dt -v /tmp/www:/var/wwwroot/default -p 8080:80 nasqueron/nginx-php-fpm

Reviewers: DorianWinty

Reviewed By: DorianWinty

Subscribers: Nasqueron Docker deployment squad

Tags: Docker images

Differential Revision: https://devcentral.nasqueron.org/D2814