Story

The MCO's OSImageStream CR has gained a spec. field called defaultStream that allows users (including the installer) to let the MCO know which stream should be picked as the default one. Given that the installer is now already aware of the OSImageStream to use at install-time the idea is to feed that value to the MCO to directly create clusters that pivots to the proper target stream at day-zero.

Acceptance Criteria

• The installer generates a very basic, spec-only, OSImageStream that only has the spec.defaultStream set.
• The MCO properly ingest the value and deployes a clusters with the two supported values (rhel-10 and rhel-9)