[GCP 4.14] [Azure/AWS <=4.13] Pod didn't trigger arm64 machineset scale out from 0 when a required node selector term on non-amd64 nodes is set

- ARM64 IPI on GCP 4.14
- ARM64 IPI on Aws and Azure <=4.13
- In general, non-amd64 single-arch clusters supporting autoscale from 0

Always

1. Create an arm64 IPI cluster on GCP
2. Set one of the machinesets to have 0 replicas: 
    oc scale -n openshift-machine-api machineset/adistefa-a1-zn8pg-worker-f
3. Deploy the default autoscaler
4. Deploy the machine autoscaler for the given machineset
5. Deploy a workload with node affinity to arm64 only nodes, large resource requests and enough number of replicas. 

From the pod events: 

pod didn't trigger scale-up: 1 node(s) didn't match Pod's node affinity/selector

The cluster autoscaler scales the machineset with 0 replicas in order to provide resources for the pending pods.

---
apiVersion: autoscaling.openshift.io/v1
kind: ClusterAutoscaler
metadata:
  name: default
spec: {}
---
apiVersion: autoscaling.openshift.io/v1beta1
kind: MachineAutoscaler
metadata:
  name: worker-us-east-1a
  namespace: openshift-machine-api
spec:
  minReplicas: 0
  maxReplicas: 12
  scaleTargetRef:
    apiVersion: machine.openshift.io/v1beta1
    kind: MachineSet
    name: adistefa-a1-zn8pg-worker-f
---
apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: openshift-machine-api
  name: 'my-deployment'
  annotations: {}
spec:
  selector:
    matchLabels:
      app: name
  replicas: 3
  template:
    metadata:
      labels:
        app: name
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
              - matchExpressions:
                - key: kubernetes.io/arch
                  operator: In
                  values:
                    - "arm64"
      containers:
        - name: container
          image: >-
            image-registry.openshift-image-registry.svc:5000/openshift/httpd:latest
          ports:
            - containerPort: 8080
              protocol: TCP
          env: []
          resources:
              requests:
                cpu: "2"
      imagePullSecrets: []
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 25%
      maxUnavailable: 25%
  paused: false