EPEL install on EL8+ needs to be modified

At the moment the playbooks will not run on an EL8+ system unless the EPEL packages are already installed. The playbooks try to install the `epel-release` package in the repositories but that does not exist on the EL distributions so it needs to be installed via an explicit RPM link as mentioned in https://github.com/adoptium/infrastructure/issues/3914#issuecomment-3468269957. We should make changes to the playbooks in order to support automatically installing EPEL from an RPM in this way.

`169.63.185.12` is a system accessible to the infrastructure team for analysis.

Read the playbooks that install EPEL and the referenced infrastructure issue comment for the EL8+ RPM approach. Use the available EL8+ system at 169.63.185.12 for analysis if appropriate, then verify that a clean EL8+ host can run the playbooks without preinstalled EPEL packages.

Written by the indexing model from the issue text.