DNF reposync Plugin

[j-mracek]

[kontura]

• The --source option should be changed to --srpm. (We are trying to unify the options in dnf5 and we have decided to use --srpm everywhere. Old dnf sometimes used --source and sometimes --srpm which was confusing.)
• Related issue: https://github.com/rpm-software-management/dnf5/issues/380

[Conan-Kudo]

Any progress on this? The reposync command is the only way to mirror RHEL content, for example.

Here's an active use of this: https://github.com/datto/rhel-reposync-playbook/blob/main/roles/install_reposync/files/rhel-reposync.sh