Add HTTPRoute to targetRef support

Author: Kate Osborn

apis/v1alpha1/clientsettingspolicy_types.go

@@ -40,7 +40,7 @@ type ClientSettingsPolicySpec struct {
 	// TargetRef identifies an API object to apply the policy to.
 	// Object must be in the same namespace as the policy.
 	//
-	// Support: Gateway
+	// Support: Gateway, HTTPRoute
 	TargetRef gatewayv1alpha2.PolicyTargetReference `json:"targetRef"`
 
 	// Body defines the client request body settings.