devel/php-composer: Update to 2.8.3

Also Remove dependency on ca_root_nss, upstream code now uses the system trust store. [1]

[1] https://github.com/composer/ca-bundle/pull/98#discussion_r1845441500

PR: 282816
Approved by: Naram Qashat <cyberbotx@cyberbotx.com> (maintainer)