aurweb: Do not try to set up tracing on non-prod deployments

It will fail since we do not connect aur-dev instances to monitoring.

roles/aurweb/templates/config.j2

@@ -78,5 +78,7 @@ error-token = {{ vault_aurweb_error_token }}
 [fastapi]
 session_secret = {{ vault_aurweb_secret }}
 
+{% if aurweb_environment_type == "prod" %}
 [tracing]
 otlp_endpoint = http://{{ hostvars['monitoring.archlinux.org']['wireguard_address'] }}:4318/v1/traces
+{% endif %}