Enable remi modules during upgrade from CentOS 7 to 8

[bathomas]

Remi provides repos for CentOS 7 and 8. In 8, the repos are modular. If a repo for a specific PHP version e.g. 7.4, has been enabled (remi-php74), remi should be enabled and the equivalent PHP module should be installed during the upgrade. Currently, PHP is downgraded from 7.4 to 7.2 in favour of the default.

On AlmaLinux 8.9, the following will enable 7.4 from the CLI:

yum install -y https://rpms.remirepo.net/enterprise/remi-release-8.rpm
yum update
dnf config-manager --set-enabled remi
dnf module reset php
dnf module install php:remi-7.4

This will need to be implemented in code (example) rather than config files.