If a new MC is created while a MOSB is building an image, this MOSB should be removed and a new MOSB should be created to build the new image including the new MC

IPI on AWS

 oc get clusterversion
NAME      VERSION                              AVAILABLE   PROGRESSING   SINCE   STATUS
version   4.20.0-0.nightly-2025-06-27-040027   True        False         6h41m   Cluster version is 4.20.0-0.nightly-2025-06-27-040027

Always

1. Enable Image Mode createing a MOSC
2. When the MOSB resource starts building the image create a MC

The os-builder pod reports this failure


2025-06-27T15:05:59.659487694Z I0627 15:05:59.659453       1 reconciler.go:1114] Updating MachineConfigPool "worker"
2025-06-27T15:05:59.659487694Z I0627 15:05:59.659470       1 reconciler.go:376] Rendered config for pool worker changed from rendered-worker-55c9b4e5fab5c47c17d76fc81f9170d7 to rendered-worker-8515ab5c29e8ea71aafd77381d625303
2025-06-27T15:05:59.659518627Z I0627 15:05:59.659502       1 reconciler.go:1401] pool "worker": No new image needs to be created, reusing last MOSB
2025-06-27T15:05:59.659518627Z I0627 15:05:59.659514       1 reconciler.go:1117] Finished updating MachineConfigPool "worker" after 311.31µs
2025-06-27T15:05:59.659541899Z I0627 15:05:59.659527       1 wrappedqueue.go:249] Error executing "<kind: \"MachineConfigPool\", name: \"worker\", func: \"(*OSBuildController).updateMachineConfigPool\">" in queue machineosbuilder: Updatin
g MachineConfigPool "worker" failed: could not create or reuse existing MachineOSBuild for MachineConfigPool "worker" change: failed to look up MachineOSBuild for pull-spec "": required pullspec empty
2025-06-27T15:05:59.659565414Z E0627 15:05:59.659552       1 wrappedqueue.go:250] "


And the current MOSB is not properly handled.

When a MOSB is building an image and a new MC is created, the current MOSB should be deleted and a new MOSB should be created containing the new MC

The expected behaviour is fully described here:
https://polarion.engineering.redhat.com/polarion/#/project/OSE/workitem?id=OCP-77576