build all of Katello on EL9

[evgeni]

No description provided.

[evgeni]

Repoclosure is related, needs #10412 which needs Candlepin on EL9

[evgeni]

Should be merged together with #10412 as that contains katello which requires: rubygem-katello

[ekohl]

Will merging this without support in katello master also break the nightly package build?

At least 👍 for the changes once the core PR is merged

[evgeni]

Will merging this without support in katello master also break the nightly package build?

At least 👍 for the changes once the core PR is merged

That's the hackish beauty of it: As you can see in this PR's test results, things build on EL9 with Ruby 3 and NodeJS 18 just fine.
Several parts of the app are broken (and that's what Katello/katello#10885 is fixing), but it's sufficiently OK to build and produce RPM that can then be tested.
So no, merging this will not break anything, but allow us to produce nightlies that can then be further tested.