fix(crd): remove unnecessary empty properties in oneOf validation (#758)

* Closes #753

Provide types for each property in oneOf

The empty properties here also produces invalid json schema when used with https://github.com/yannh/kubeconform

* Remove properties

Author: davidholsgrove

charts/kubernetes-external-secrets/crds/kubernetes-client.io_externalsecrets_crd.yaml

@@ -122,19 +122,10 @@ spec:
                           Used by: secretsManager
                         type: string
                     oneOf:
-                      - properties:
-                          key:
-                          name:
-                          property:
-                          isBinary:
-                          secretType:
-                        required:
+                      - required:
                           - key
                           - name
-                      - properties:
-                          path:
-                          recursive:
-                        required:
+                      - required:
                           - path
                 roleArn:
                   type: string