Adds mailing list rustyk8s

Adding a new mailing list for collaboration around
implementing the Kubernetes API in Rust. For more details on
the group, see:

https://www.cloudatomiclab.com/rustyk8s/

Change-Id: Ifb7c20725b07cb96ef69425ceb69ecff5f41da67

modules/openstack_project/manifests/lists.pp

@@ -483,4 +483,12 @@ class openstack_project::lists(
     password    => $listpassword,
     description => 'Collaborating on Rust-based virtual machine monitors.',
   }
+
+  mailman_list { 'rustyk8s@opendev':
+    require     => Mailman::Site['opendev'],
+    ensure      => present,
+    admin       => 'allison@lohutok.net',
+    password    => $listpassword,
+    description => 'Collaborating on Rust-based Kubernetes API.',
+  }
 }