In https://gitlab.com/gitlab-org/gitlab/-/merge_requests/59907 we
explicitly set the number of retries for all existing workers to 3.
However, this included workers that use CronjobQueue, where retries are
disabled, which was confusing. We were essentially doing:

    class MyWorker
      include ApplicationWorker

      sidekiq_options retry: 3 # In the worker class
      include CronjobQueue # Which does ...
      sidekiq_options retry: false # ... and this takes precedence
    end

This change simply removes `retry: 3` from all workers that include the
CronjobQueue. Done with:

    ag -l 'retry: 3' app/workers/ ee/app/workers/ |
      xargs ag -l CronjobQueue |
      xargs -L1 sed -z -i'' 's/\n *sidekiq_options retry: 3\n/\n/g'

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