feat: update cluster.yaml file (#778)

* feat: update cluster.yaml file

* feat: update cluster.yaml for default platform storage class

* fix: default platform storage class title

* fix: cluster.yaml schema

---------

Co-authored-by: svcAPLBot <[email protected]>

Author: ferruhcihan

src/openapi/cluster.yaml

@@ -31,6 +31,11 @@ Cluster:
       default: otomi
     provider:
       $ref: 'definitions.yaml#/provider'
+    defaultStorageClass:
+      title: Default storage class
+      type: string
+      description: Default storage class for platform components. Use '' for relying on the cluster's default storage class.
+      default: ''
   required:
     - name
     - provider