Description of the problem:
Unable to deploy a spoke cluster on an OCP 4.11 hub - spoke BMHs stuck in inspecting state and assisted-service pod in CrashLoopBackOff

oc get pods -n assisted-installer
NAME                                       READY   STATUS             RESTARTS        AGE
agentinstalladmission-66475fdfc8-ml7xf     1/1     Running            0               27h
agentinstalladmission-66475fdfc8-r4p44     1/1     Running            0               27h
assisted-image-service-0                   1/1     Running            0               27h
assisted-service-7dd9cbffc9-xbdbx          1/2     CrashLoopBackOff   86 (2m7s ago)   7h47m
infrastructure-operator-844bdf9474-r8sn6   1/1     Running            0               27h

time="2022-06-03T14:23:19Z" level=info msg="PreprovisioningImage Reconcile ended" func="github.com/openshift/assisted-service/internal/controller/controllers.(*PreprovisioningImageReconciler).Reconcile.func1" file="/go/src/github.com/openshift/origin/internal/controller/controllers/preprovisioningimage_controller.go:78" go-id=416 preprovisioning_image=cnfde14.ptp.lab.eng.bos.redhat.com preprovisioning_image_namespace=cnfde14 request_id=67bc3092-3df7-4893-929f-982de264365b
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x50 pc=0x27338b8]

goroutine 416 [running]:
github.com/openshift/assisted-service/internal/controller/controllers.(*PreprovisioningImageReconciler).getIronicAgentImage(_, {_, _}, {{{0xc00225e3f0, 0xe}, {0xc0018a8330, 0x24}, {0xc00225e3ea, 0x6}, 0xc001664258, ...}, ...})
	/go/src/github.com/openshift/origin/internal/controller/controllers/preprovisioningimage_controller.go:322 +0x38
github.com/openshift/assisted-service/internal/controller/controllers.(*PreprovisioningImageReconciler).AddIronicAgentToInfraEnv(0xc001fcf3b0, {0x36c4730, 0xc0010860f0}, {0x37583f0, 0xc000822460}, 0xc001896900)
	/go/src/github.com/openshift/origin/internal/controller/controllers/preprovisioningimage_controller.go:290 +0x130
github.com/openshift/assisted-service/internal/controller/controllers.(*PreprovisioningImageReconciler).Reconcile(0xc001fcf3b0, {0x36c4730, 0xc0010860c0}, {{{0xc001328756, 0x2ee31e0}, {0xc001908990, 0x30}}})
	/go/src/github.com/openshift/origin/internal/controller/controllers/preprovisioningimage_controller.go:102 +0xb8b
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Reconcile(0xc00198a9a0, {0x36c4730, 0xc001086030}, {{{0xc001328756, 0x2ee31e0}, {0xc001908990, 0x415694}}})
	/go/src/github.com/openshift/origin/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:114 +0x26f
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).reconcileHandler(0xc00198a9a0, {0x36c4688, 0xc000c7b540}, {0x2cc2be0, 0xc0018b0120})
	/go/src/github.com/openshift/origin/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:311 +0x33e
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem(0xc00198a9a0, {0x36c4688, 0xc000c7b540})
	/go/src/github.com/openshift/origin/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:266 +0x205
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2()
	/go/src/github.com/openshift/origin/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:227 +0x85
created by sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2
	/go/src/github.com/openshift/origin/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:223 +0x357

Release version:
- Latest upstream assisted-service-operator
- OCP 4.11 on hub (4.11.0-0.nightly-2022-05-25-193227)
- 4.10 spoke


Steps to reproduce:
1. Deploy OCP 4.11 hub with upstream assisted-service-operator
2. Try to deploy spoke using manually created CRs


Actual results:
- Assisted-service pod crashed after creating a BMH
- BMH stuck "inspecting"


Expected results:
The spoke is deployed as expected

Additional info:
The OpenshiftVersion has not be reconciled to InfraEnv:
oc describe InfraEnv -n cnfde14 cnfde14
Name:         cnfde14
Namespace:    cnfde14
Labels:       <none>
Annotations:  argocd.argoproj.io/sync-wave: 1
              ran.openshift.io/ztp-gitops-generated: {}
API Version:  agent-install.openshift.io/v1beta1
Kind:         InfraEnv
Metadata:
  Creation Timestamp:  2022-06-03T14:19:26Z
  Finalizers:
    infraenv.agent-install.openshift.io/ai-deprovision
  Generation:  1
  Managed Fields:
    API Version:  agent-install.openshift.io/v1beta1
    Fields Type:  FieldsV1
    fieldsV1:
      f:metadata:
        f:finalizers:
          .:
          v:"infraenv.agent-install.openshift.io/ai-deprovision":
    Manager:      assisted-service
    Operation:    Update
    Time:         2022-06-03T14:19:26Z
    API Version:  agent-install.openshift.io/v1beta1
    Fields Type:  FieldsV1
    fieldsV1:
      f:status:
        .:
        f:agentLabelSelector:
          .:
          f:matchLabels:
            .:
            f:infraenvs.agent-install.openshift.io:
        f:bootArtifacts:
          .:
          f:initrd:
          f:ipxeScript:
          f:kernel:
          f:rootfs:
        f:conditions:
        f:createdTime:
        f:debugInfo:
          .:
          f:eventsURL:
        f:isoDownloadURL:
    Manager:      assisted-service
    Operation:    Update
    Subresource:  status
    Time:         2022-06-03T14:19:26Z
    API Version:  agent-install.openshift.io/v1beta1
    Fields Type:  FieldsV1
    fieldsV1:
      f:metadata:
        f:annotations:
          .:
          f:argocd.argoproj.io/sync-wave:
          f:kubectl.kubernetes.io/last-applied-configuration:
          f:ran.openshift.io/ztp-gitops-generated:
      f:spec:
        .:
        f:additionalNTPSources:
        f:clusterRef:
          .:
          f:name:
          f:namespace:
        f:cpuArchitecture:
        f:nmStateConfigLabelSelector:
          .:
          f:matchLabels:
            .:
            f:nmstate-label:
        f:pullSecretRef:
          .:
          f:name:
        f:sshAuthorizedKey:
    Manager:         kubectl-client-side-apply
    Operation:       Update
    Time:            2022-06-03T14:19:26Z
  Resource Version:  1098847
  UID:               805103d1-9e73-4cc4-9cdc-8191774c81f2
Spec:
  Additional NTP Sources:
    2.pool.ntp.org
  Cluster Ref:
    Name:            cnfde14
    Namespace:       cnfde14
  Cpu Architecture:  x86_64
  Nm State Config Label Selector:
    Match Labels:
      Nmstate - Label:  cnfde14
  Pull Secret Ref:
    Name:              pull-secret
  Ssh Authorized Key:  ssh-rsa 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 tali@Taos-MacBook-Pro
Status:
  Agent Label Selector:
    Match Labels:
      infraenvs.agent-install.openshift.io:  cnfde14
  Boot Artifacts:
    Initrd:       https://assisted-image-service-assisted-installer.apps.ocp-edge-cluster-assisted-0.qe.lab.redhat.com/images/de05147a-b1c8-488d-9fd2-9b37dbbfea63/pxe-initrd?api_key=eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbmZyYV9lbnZfaWQiOiJkZTA1MTQ3YS1iMWM4LTQ4OGQtOWZkMi05YjM3ZGJiZmVhNjMifQ.Gyg8-sXdNPbzhZ62C1wmXHrcgZgNdEvkXhGcC_yEYhKeHC13fpNtcUe3D_EhZtcGytnrtlbgYXThdGHWjrAVCA&arch=x86_64&version=4.10
    Ipxe Script:  https://assisted-service-assisted-installer.apps.ocp-edge-cluster-assisted-0.qe.lab.redhat.com/api/assisted-install/v2/infra-envs/de05147a-b1c8-488d-9fd2-9b37dbbfea63/downloads/files?api_key=eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbmZyYV9lbnZfaWQiOiJkZTA1MTQ3YS1iMWM4LTQ4OGQtOWZkMi05YjM3ZGJiZmVhNjMifQ.Oux_zuzwk66b9BzBEOYHJVE71tRXeB3y6C4s5BylkGg4aO9q6g44rbE9pip4xDgOnuEc9IMj0VhIyWKKsM1GkQ&file_name=ipxe-script
    Kernel:       https://assisted-image-service-assisted-installer.apps.ocp-edge-cluster-assisted-0.qe.lab.redhat.com/boot-artifacts/kernel?arch=x86_64&version=4.10
    Rootfs:       https://assisted-image-service-assisted-installer.apps.ocp-edge-cluster-assisted-0.qe.lab.redhat.com/boot-artifacts/rootfs?arch=x86_64&version=4.10
  Conditions:
    Last Transition Time:  2022-06-03T14:19:26Z
    Message:               Image has been created
    Reason:                ImageCreated
    Status:                True
    Type:                  ImageCreated
  Created Time:            2022-06-03T14:19:26Z
  Debug Info:
    Events URL:      https://assisted-service-assisted-installer.apps.ocp-edge-cluster-assisted-0.qe.lab.redhat.com/api/assisted-install/v2/events?api_key=eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbmZyYV9lbnZfaWQiOiJkZTA1MTQ3YS1iMWM4LTQ4OGQtOWZkMi05YjM3ZGJiZmVhNjMifQ.fvqqDvw4jMK0htX3JlraPYTdbj0954avjt-Zb5vjKINHBaDa806myO7LvFqW6QBJ2STuBKyorRJx34ELQiDxZw&infra_env_id=de05147a-b1c8-488d-9fd2-9b37dbbfea63
  Iso Download URL:  https://assisted-image-service-assisted-installer.apps.ocp-edge-cluster-assisted-0.qe.lab.redhat.com/images/de05147a-b1c8-488d-9fd2-9b37dbbfea63?api_key=eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbmZyYV9lbnZfaWQiOiJkZTA1MTQ3YS1iMWM4LTQ4OGQtOWZkMi05YjM3ZGJiZmVhNjMifQ.cIPxpwBT70gJWKXMc-mbiU2kKnny6TmftpMhff7fXW2nafEpoldrt9IZQTflvWNgfhYWoMksmUvnp1EgaoaQqw&arch=x86_64&type=minimal-iso&version=4.10
Events:              <none>