Drop EL8 bits from Nightly

[Odilhao]

No description provided.

[ekohl]

We have more files, like modulemd/modulemd-foreman-el8.yaml and modulemd/modulemd-katello-el8.yaml. Then there's the group of shell scripts that still default to el8 in many places:

• add_npm_package.sh
• remove_from_comps
• add_to_comps.rb
• add_pypi_package.sh
• add_gem_package.sh

Then we have a bit of a wildcard and that's rhel8-kickstart-setup. @evgeni or @ehelms know what we should do with this? It's following the upstream name, but should that be updated to rhel9 now?

[ekohl]

I started #11370 to make changing the comps files a bit easier.

[Odilhao]

I had the add_* scripts modified here to drop EL8, I removed and force pushed again

[adamruzicka]

Do we also want to keep mock config for el8 around? I know we've kept the one for el7, but is it still needed?

[Odilhao]

Do we also want to keep mock config for el8 around? I know we've kept the one for el7, but is it still needed?

Since we still have clients on EL8, I'm not sure if we need to drop mock now.

[ekohl]

We can deal with the add scripts in my PR. This PR now looks OK, but please fix up theforeman/jenkins-jobs#495 so we can merge this.

[Odilhao]

I forgot about theforeman/jenkins-jobs#495 sorry, just pushed the change there.