[test_alerts] Add check for Prometheus rule deletion

roles/test_alerts/tasks/test_create_an_alert.yml

@@ -42,12 +42,12 @@
       until: '"FVT_TESTING Collectd metrics receive rate is zero" in cmd_output.stdout'
 
   always:
-    - name: "Delete the alert"
+    - name: "Delete the PrometheusRule"
       ansible.builtin.command:
         cmd: |
           oc delete prometheusrule.{{ observability_api }} fvt-testing-prometheus-alarm-rules
 
-    - name: Wait up to two minutes until the alert is deleted
+    - name: Wait up to two minutes until the rule is deleted
       ansible.builtin.command:
         cmd: |
           curl -k {{ prom_auth_string }} https://{{ prom_url }}/api/v1/rules

roles/test_alerts/tasks/test_creating_a_standard_alert_route_in_alert_manager.yml

@@ -72,7 +72,6 @@
           for i in {1..15}; do oc delete po -l application=default-interconnect; sleep 1; done
       changed_when: false
 
-      # The wget executable is not available in prometheus container
     - name: "RHELOSP-148698 Verify that the alert is active in Alertmanager"
       ansible.builtin.shell:
         cmd: >-
@@ -103,6 +102,14 @@
       ansible.builtin.command: |
         oc delete prometheusrule.{{ observability_api }} fvt-testing-prometheus-alarm-rules
 
+    - name: "Wait up to two minutes until the rule is deleted"
+      ansible.builtin.command:
+        cmd: |
+          curl -k {{ prom_auth_string }} https://{{ prom_url }}/api/v1/rules
+      retries: 12
+      delay: 10
+      until: 'not "FVT_TESTING Collectd metrics receive rate is zero" in cmd_output.stdout'
+
     - name: "Wait up to 2 minutes to make sure all default-interconnect pods are back"
       ansible.builtin.command:
         oc get pods -l application=default-interconnect