distributed secrets to group_vars and added karakeep

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

group_vars/k3s/vars.yml

@@ -3,7 +3,7 @@ db:
     user: "postgres"
   name: "k3s"
   user: "k3s"
-  password: "{{ vault.k3s.postgres.db.password }}"
+  password: "{{ vault_k3s.postgres.db.password }}"
   listen_address: "{{ k3s.db.ip }}"
 
 k3s: