feat(vaultwarden): add SMTP configuration options and enhance signup settings

- Introduced SMTP settings for Vaultwarden including host, port, security, and authentication details.
- Added variables for signup verification, 2FA settings, password hints, and logging options.
- Updated Vaultwarden deployment to utilize new SMTP configurations.
- Enhanced Grafana module to support dynamic dashboard and datasource provisioning.
- Added LLM proxy configuration for Open Web UI with necessary environment variables.

ansible/roles/gpu_monitoring/templates/prometheus.yml.j2

@@ -21,10 +21,3 @@ scrape_configs:
       - targets: ["{{ prometheus_host_gateway }}:{{ amd_exporter_port }}"]
         labels:
           datacenter: "{{ inventory_hostname }}"
-
-  - job_name: llama_exporter
-    metrics_path: /metrics
-    static_configs:
-      - targets: ["{{ prometheus_host_gateway }}:{{ llama_exporter_port }}"]
-        labels:
-          datacenter: "{{ inventory_hostname }}"