The docs have insufficient perms for GCP:

https://access.redhat.com/documentation/en-us/openshift_container_platform/4.12/html-single/backup_and_restore/index#migration-configuring-gcp_installing-oadp-gcp

Our docs show the following role permissions:

$ ROLE_PERMISSIONS=(
compute.disks.get
compute.disks.create
compute.disks.createSnapshot
compute.snapshots.get
compute.snapshots.create
compute.snapshots.useReadOnly
compute.snapshots.delete
compute.zones.get
)
 

Whereas the Upstream docs show the following role permissions:

ROLE_PERMISSIONS=(
compute.disks.get
compute.disks.create
compute.disks.createSnapshot
compute.snapshots.get
compute.snapshots.create
compute.snapshots.useReadOnly
compute.snapshots.delete
compute.zones.get
storage.objects.create
storage.objects.delete
storage.objects.get
storage.objects.list
iam.serviceAccounts.signBlob
)

Please update the docs to show the upstream role permissions.