OTA to manage versions for managed clusters

Currently the ROSA/ARO versions are not managed by OTA team.
This Feature covers the engineering effort to take the responsibility of management of OCP version management in OSD, ROSA and ARO from SRE-P to OTA.

Here is the design document for the effort: https://docs.google.com/document/d/1hgMiDYN9W60BEIzYCSiu09uV4CrD_cCCZ8As2m7Br1s/edit?skip_itp2_check=true&pli=1

Here are some objectives :

• Managed clusters would get update recommendations from Red Hat hosted OSUS directly without much middle layers like ClusterImageSet.
• The new design should reduce the cost of maintaining versions for managed clusters including Hypershift hosted control planes.

Presentation from jeder@redhat.com :

• https://docs.google.com/presentation/d/1T4KAO6QrT5dSXA6kBpDQ47pCnM0PGv6z8BD1z5PN0Gk
• Recording of pitch meeting:  https://drive.google.com/file/d/1yTWdzZICiKNXyHlCqwCurn5h_hFYD_LG/view