Description of the problem: Failed to provision openshift 4.10 on bare metal

Release version:

Operator snapshot version:
- ACM 2.5.0-DOWNSTREAM-2022-03-14-13-03-46 (S4)
- MCE 2.0.0-DOWNANDBACK-2022-03-13-16-38-39

OCP version: 4.9.23

Browser Info:

Steps to reproduce:
1. Provision spoke cluster on bare metal 

Actual results:
Cluster deployment failed

Expected results:

Additional info:

oc get cd -n slot-02
NAME      INFRAID   PLATFORM    REGION   VERSION   CLUSTERTYPE   PROVISIONSTATUS    POWERSTATE   AGE
slot-02             baremetal                                    ProvisionStopped                3m28s

oc get cd -n slot-02 slot-02 -ojsonpath='{.status.conditions[0]}' | jq .
{
  "lastProbeTime": "2022-03-16T19:58:15Z",
  "lastTransitionTime": "2022-03-16T19:58:15Z",
  "message": "Unknown error - installer failed to load install config",
  "reason": "FallbackInvalidInstallConfig",
  "status": "True",
  "type": "ProvisionFailed"
}

provision.log:
time="2022-03-16T19:58:13Z" level=fatal msg="failed to fetch Master Machines: failed to load asset \"Install Config\": failed to unmarshal install-config.yaml: failed to parse first occurence of unknown field: error unmarshaling JSON: while decoding JSON: json: unknown field \"namespace\""
time="2022-03-16T19:58:14Z" level=error msg="error after waiting for command completion" error="exit status 1" installID=t4bgvv8w
time="2022-03-16T19:58:14Z" level=error msg="error generating installer assets" error="exit status 1" installID=t4bgvv8w
time="2022-03-16T19:58:14Z" level=info msg="reading installer log" installID=t4bgvv8w
time="2022-03-16T19:58:14Z" level=info msg="saving installer output" installID=t4bgvv8w
time="2022-03-16T19:58:14Z" level=debug msg="installer console log: level=fatal msg=failed to fetch Master Machines: failed to load asset \"Install Config\": failed to unmarshal install-config.yaml: failed to parse first occurence of unknown field: error unmarshaling JSON: while decoding JSON: json: unknown field \"namespace\"\n" installID=t4bgvv8w
time="2022-03-16T19:58:14Z" level=info msg="updating clusterprovision" installID=t4bgvv8w
time="2022-03-16T19:58:14Z" level=fatal msg="runtime error" error="exit status 1"