vendor: update all dependencies

vendor/google.golang.org/api/container/v1/container-gen.go

@@ -560,6 +560,10 @@ type Cluster struct {
 	//   "ERROR" - The ERROR state indicates the cluster may be unusable.
 	// Details
 	// can be found in the `statusMessage` field.
+	//   "DEGRADED" - The DEGRADED state indicates the cluster requires user
+	// action to restore
+	// full functionality. Details can be found in the `statusMessage`
+	// field.
 	Status string `json:"status,omitempty"`
 
 	// StatusMessage: [Output only] Additional information about the current
@@ -1522,10 +1526,17 @@ type NodeConfig struct {
 	// server.
 	// Additionally, to avoid ambiguity, keys must not conflict with any
 	// other
-	// metadata keys for the project or be one of the four reserved
-	// keys:
-	// "instance-template", "kube-env", "startup-script", and
-	// "user-data"
+	// metadata keys for the project or be one of the reserved keys:
+	//  "cluster-location"
+	//  "cluster-name"
+	//  "cluster-uid"
+	//  "configure-sh"
+	//  "gci-update-strategy"
+	//  "gci-ensure-gke-docker"
+	//  "instance-template"
+	//  "kube-env"
+	//  "startup-script"
+	//  "user-data"
 	//
 	// Values are free-form strings, and only have meaning as interpreted
 	// by