Better resourceref flexibility (#149)

<!-- This change is generated by MagicModules. -->
/cc @rambleraptor

plugins/modules/gcp_container_node_pool_facts.py

@@ -49,10 +49,9 @@ options:
     description:
     - The cluster this node pool belongs to.
     - 'This field represents a link to a Cluster resource in GCP. It can be specified
-      in two ways. You can add `register: name-of-resource` to a gcp_container_cluster
-      task and then set this cluster field to "{{ name-of-resource }}" Alternatively,
-      you can set this cluster to a dictionary with the name key where the value is
-      the name of your Cluster'
+      in two ways. First, you can place in the name of the resource here as a string
+      Alternatively, you can add `register: name-of-resource` to a gcp_container_cluster
+      task and then set this cluster field to "{{ name-of-resource }}"'
     required: true
 extends_documentation_fragment: gcp
 '''
@@ -249,7 +248,7 @@ items:
       description:
       - The cluster this node pool belongs to.
       returned: success
-      type: dict
+      type: str
     zone:
       description:
       - The zone where the node pool is deployed.
@@ -272,7 +271,7 @@ def main():
     module = GcpModule(
         argument_spec=dict(
             zone=dict(required=True, type='str'),
-            cluster=dict(required=True, type='dict')
+            cluster=dict(required=True)
         )
     )