change oc adm mirror in order to use oc-mirror (#598) Migrate mirror steps to use oc-mirror This is quite a big change and it did a refactor on several areas of the code base. The gist and most important parts of this change are: - The ocp-mirror and olm-mirror have now been merged - The mirror is now done using `oc-mirror` - The mirror step only syncs the required packages from selected channels instead of downloading the latest from every channel as it was doing before. Architectures are not filtered. - There is now a single organization in Quay called `ztpfw` - ICSPs and catalogsources are created by oc-mirror - The catalogsource names are kept as the upstream ones to avoid having to mess with the subscriptions. Minor changes: - Several sleeps have been removed in favor of waiting for resources