Remove --nogpgcheck from package installation

What is your Merge about?

There was a low finding that we were using --nogpgcheck in dnf install. This change brings in the appropriate GPG keys from EPEL and Almalinux (where we get our required packages from).

For more information please visit Iron Bank Documentation

Note: Please be sure you create an issue related to this merge request and the issue is labeled StatusReview, this will initiate a CHT member review of your merge request.