Support DNS-based endpoint (#318)

This is a rebase and deps update of #317

---------

Co-authored-by: Yuki Furuyama <addsict@gmail.com>

README.md

@@ -96,6 +96,9 @@ jobs:
     endpoint](https://cloud.google.com/anthos/multicluster-management/gateway)
     to connect to cluster.
 
+-   <a name="use_dns_based_endpoint"></a><a href="#user-content-use_dns_based_endpoint"><code>use_dns_based_endpoint</code></a>: _(Optional, default: `false`)_ Set this true to use [DNS-based endpoint](https://cloud.google.com/kubernetes-engine/docs/concepts/network-isolation#dns-based_endpoint)
+    to connect to the cluster.
+
 -   <a name="fleet_membership_name"></a><a href="#user-content-fleet_membership_name"><code>fleet_membership_name</code></a>: _(Optional)_ Fleet membership name to use for generating Connect Gateway endpoint, of
     the form:
 

action.yml

@@ -79,6 +79,13 @@ inputs:
       to connect to cluster.
     default: 'false'
     required: false
+
+  use_dns_based_endpoint:
+    description: |-
+      Set this true to use [DNS-based endpoint](https://cloud.google.com/kubernetes-engine/docs/concepts/network-isolation#dns-based_endpoint)
+      to connect to the cluster.
+    default: 'false'
+    required: false
 
   fleet_membership_name:
     description: |-