Send all alertmanager notifications from the same handler

roles/prometheus/templates/alertmanager.yml.j2

@@ -20,14 +20,9 @@ route:
 
   # Only severity=page alerts are ever sent anywhere.
   routes:
-    - receiver: 'alert-email'
+    - receiver: alert
       match:
         severity: page
-{% for webhook in alert_webhook_receivers | default([]) %}
-    - receiver: "{{ webhook.name }}"
-      match:
-        severity: page
-{% endfor %}
 
 # The following inhibit rules are meant to work both with the job/host
 # hierarchy (for standard metrics) and with the probe/target one (for
@@ -61,15 +56,16 @@ inhibit_rules:
 
 receivers:
   - name: default
-  - name: 'alert-email'
+  - name: alert
 {% if alert_email %}
     email_configs:
       - to: '{{ alert_email }}'
 {% endif %}
-{% for webhook in alert_webhook_receivers | default([]) %}
-  - name: "{{ webhook.name }}"
+{% if alert_webhook_receivers | default([]) %}
     webhook_configs:
+{% for webhook in alert_webhook_receivers %}
       - url: "{{ webhook.url }}"
         send_resolved: {{ webhook.send_resolved | default(False) | to_json }}
 {% endfor %}
+{% endif %}