Agent can't find 'boot.catalog' when creating agent.aarch64.iso

openshift-install is unable to generate an aarch64 iso:
              
FATAL failed to write asset (Agent Installer ISO) to disk: missing boot.catalog file 

    4.16

    100 %

    1. Create an install_config.yaml with controlplane.architecture and compute.architecture = arm64 
    2. openshift-install agent create image  --log-level debug     

DEBUG Generating Agent Installer ISO... 
INFO Consuming Install Config from target directory 
DEBUG Purging asset "Install Config" from disk 
INFO Consuming Agent Config from target directory 
DEBUG Purging asset "Agent Config" from disk 
DEBUG initDisk(): start DEBUG initDisk(): regular file 
FATAL failed to write asset (Agent Installer ISO) to disk: missing boot.catalog file 

    agent.aarch64.iso is created

Seems to be related to this PR:
https://github.com/openshift/installer/pull/7896

boot.catalog is also referenced in the assisted-image-service here:
https://github.com/openshift/installer/blob/master/vendor/github.com/openshift/assisted-image-service/pkg/isoeditor/isoutil.go#L155