Explicitely exclude Perl to avoid inclusion in the image via optional
dependencies.

We can now do that as all the indirect dependencies have been fixed.

In general, we want to keep the base image as small as possible and with
as few interpreters as possible. Users should install any addition
interpreters that they may need inside a container or via package
layering.

See: https://pagure.io/fedora-kde/SIG/issue/566
See: https://github.com/fedora-silverblue/issue-tracker/issues/613