Manage scheduled jobs after rename (recheck > reverify)

The following discussions from !14979 (merged) should be addressed:

• @brodock started a discussion: (+1 comment)

  we need to keep both new and the old one :recheck_repositories for a while, otherwise it will fail already scheduled jobs.

  should we add a removal TODO for 13.O?

• @brodock started a discussion:

  same as below, keep both recheck and reverify and remove the old one in 13.O, to not break existing scheduled jobs.