feat: add HNS support for storage bucket

mmv1/third_party/terraform/services/storage/resource_storage_bucket.go.tmpl

@@ -549,6 +549,23 @@ func ResourceStorageBucket() *schema.Resource {
 					},
 				},
 			},
+			"hierarchical_namespace": {
+				Type:        schema.TypeList,
+				MaxItems:    1,
+				Optional:    true,
+				Description: `The bucket's HNS support, which defines bucket can organize folders in logical file system structure`,
+				Elem : &schema.Resource{
+					Schema: map[string]*schema.Schema{
+						"enabled": {
+							Type:        schema.TypeBool,
+							Default:     false,
+							Optional:    true,
+							ForceNew:    true,
+							Description: `Set this enabled flag to true when folders with logical files structure. Default value is false.`,
+						},
+					},
+				},
+			},
 		},
 		UseJSONNumber: true,
 	}

mmv1/third_party/terraform/services/storage/resource_storage_bucket_test.go.tmpl

@@ -18,6 +18,46 @@ import (
 	"google.golang.org/api/storage/v1"
 )
 
+func TestAccStorageBucket_basic_hns(t *testing.T) {
+	t.Parallel()
+
+	bucketName := acctest.TestBucketName(t)
+
+	acctest.VcrTest(t, resource.TestCase{
+		PreCheck:                 func() { acctest.AccTestPreCheck(t) },
+		ProtoV5ProviderFactories: acctest.ProtoV5ProviderFactories(t),
+		CheckDestroy:             testAccStorageBucketDestroyProducer(t),
+		Steps: []resource.TestStep{
+			{
+				Config: testAccStorageBucket_basic_hns(bucketName),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr(
+						"google_storage_bucket.bucket", "hierarchical_namespace.0.enabled", "true"),
+				),
+			},
+			{
+				ResourceName:            "google_storage_bucket.bucket",
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"force_destroy"},
+			},
+		},
+	})
+}
+
+func testAccStorageBucket_basic_hns(bucketName string) string {
+	return fmt.Sprintf(`
+resource "google_storage_bucket" "bucket" {
+  name     = "%s"
+  location = "US"
+  uniform_bucket_level_access = true
+  hierarchical_namespace {
+	enabled = true
+  }
+}
+`, bucketName)
+}
+
 func TestAccStorageBucket_basic(t *testing.T) {
 	t.Parallel()