feat: add vault

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/cuddle-clusters/tests/with_vault_secrets/templates/clusters/some.yaml.jinja2

@@ -26,13 +26,13 @@ spec:
         envFrom:
         - configMapRef:
             name: {{service_name}}-config
-        {%- if vars.vault_secret is defined and (vars.vault_secret.secrets | length) > 0 %}
+        {%- if vars.vault_secret.has_values %}
         env:
         {%- for secret in vars.vault_secret.secrets %}
         - name: {{secret  | upper | replace(".", "_") | replace("-", "_") }}
           valueFrom:
             secretKeyRef:
-              name: {{ service_name }}-{{ vars.vault_secret.name }}
+              name: {{ vars.vault_secret.file_name(service_name) }}
               key: {{ secret }}
         {%- endfor %}
         {%- endif %}