fix: use a consistent MachineDeployment class name (#612)

**What problem does this PR solve?**:
Makes it easier for clients to consume the default ClusterClass
templates and have consistent MD class names across providers.

**Which issue(s) this PR fixes**:
Fixes #

**How Has This Been Tested?**:
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Author: dkoshkin

charts/cluster-api-runtime-extensions-nutanix/defaultclusterclasses/nutanix-cluster-class.yaml

@@ -75,7 +75,7 @@ spec:
     name: worker-config
   workers:
     machineDeployments:
-    - class: nutanix-quick-start-worker
+    - class: default-worker
       machineHealthCheck:
         maxUnhealthy: 40%
         nodeStartupTimeout: 10m

examples/capi-quick-start/nutanix-cluster-calico-crs.yaml

@@ -140,7 +140,7 @@ spec:
     version: ${KUBERNETES_VERSION}
     workers:
       machineDeployments:
-      - class: nutanix-quick-start-worker
+      - class: default-worker
         metadata:
           annotations:
             cluster.x-k8s.io/cluster-api-autoscaler-node-group-max-size: "${WORKER_MACHINE_COUNT}"

examples/capi-quick-start/nutanix-cluster-calico-helm-addon.yaml

@@ -140,7 +140,7 @@ spec:
     version: ${KUBERNETES_VERSION}
     workers:
       machineDeployments:
-      - class: nutanix-quick-start-worker
+      - class: default-worker
         metadata:
           annotations:
             cluster.x-k8s.io/cluster-api-autoscaler-node-group-max-size: "${WORKER_MACHINE_COUNT}"

examples/capi-quick-start/nutanix-cluster-cilium-crs.yaml

@@ -140,7 +140,7 @@ spec:
     version: ${KUBERNETES_VERSION}
     workers:
       machineDeployments:
-      - class: nutanix-quick-start-worker
+      - class: default-worker
         metadata:
           annotations:
             cluster.x-k8s.io/cluster-api-autoscaler-node-group-max-size: "${WORKER_MACHINE_COUNT}"

examples/capi-quick-start/nutanix-cluster-cilium-helm-addon.yaml

@@ -140,7 +140,7 @@ spec:
     version: ${KUBERNETES_VERSION}
     workers:
       machineDeployments:
-      - class: nutanix-quick-start-worker
+      - class: default-worker
         metadata:
           annotations:
             cluster.x-k8s.io/cluster-api-autoscaler-node-group-max-size: "${WORKER_MACHINE_COUNT}"

hack/examples/bases/nutanix/cluster/kustomization.yaml.tmpl

@@ -66,3 +66,11 @@ patches:
 - target:
     kind: Cluster
   path: ../../../patches/dockerhub-image-registry.yaml
+
+# Change the machineDeployments Class to match the other examples.
+- target:
+    kind: Cluster
+  patch: |-
+    - op: "replace"
+      path: "/spec/topology/workers/machineDeployments/0/class"
+      value: default-worker

hack/examples/bases/nutanix/clusterclass/kustomization.yaml.tmpl

@@ -30,6 +30,14 @@ patches:
     - op: "remove"
       path: "/spec/variables"
 
+# Change the machineDeployments Class to match the other examples.
+- target:
+    kind: ClusterClass
+  patch: |-
+    - op: "replace"
+      path: "/spec/workers/machineDeployments/0/class"
+      value: default-worker
+
 # Delete the certSANs from the template
 # They will be added by the handler.
 - target: