Don't try to install now bundled PHP extensions

Summary:
For PHP 8.1 and 8.2, the openssl extension is bundled with PHP
FreeBSD package:

$ php -i | grep -i openssl
openssl
OpenSSL support => enabled
OpenSSL Library Version => OpenSSL 1.1.1t-freebsd  7 Feb 2023
[…]

Test Plan: Tested on web-001 through D3045

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D3046