Set return_partial_success=true in GKE Hub GetFeature call to ensure partial results are returned when a region is down (GoogleCloudPlatform#13453)

Author: yufan-su

mmv1/products/gkehub2/Feature.yaml

@@ -22,8 +22,9 @@ references:
 docs:
 id_format: 'projects/{{project}}/locations/{{location}}/features/{{name}}'
 base_url: 'projects/{{project}}/locations/{{location}}/features'
-self_link: 'projects/{{project}}/locations/{{location}}/features/{{name}}'
+self_link: 'projects/{{project}}/locations/{{location}}/features/{{name}}?return_partial_success=true'
 create_url: 'projects/{{project}}/locations/{{location}}/features?featureId={{name}}'
+delete_url: 'projects/{{project}}/locations/{{location}}/features/{{name}}'
 update_url: 'projects/{{project}}/locations/{{location}}/features/{{name}}'
 update_verb: 'PATCH'
 update_mask: true
@@ -44,6 +45,7 @@ async:
 iam_policy:
   method_name_separator: ':'
   parent_resource_attribute: 'name'
+  base_url: 'projects/{{project}}/locations/{{location}}/features/{{name}}'
   example_config_body: 'templates/terraform/iam/iam_attributes.go.tmpl'
   import_format:
     - 'projects/{{project}}/locations/{{location}}/features/{{name}}'

mmv1/third_party/tgc/tests/data/example_gke_hub_feature.json

@@ -1,6 +1,6 @@
 [
     {
-        "name": "//gkehub.googleapis.com/projects/{{.Provider.project}}/locations/global/features/multiclusterservicediscovery",
+        "name": "//gkehub.googleapis.com/projects/{{.Provider.project}}/locations/global/features/multiclusterservicediscovery?return_partial_success=true",
         "ancestry_path": "{{.Ancestry}}/project/{{.Provider.project}}",
         "asset_type": "gkehub.googleapis.com/Feature",
         "resource": {