[test_verify_email] Clean up the PrometheusRule post-test (#196)

Delete the PrometheusRule and wait for it to be deleted

roles/test_verify_email/tasks/main.yml

@@ -1,5 +1,16 @@
 ---
 # tasks file for roles/test_verify_email
+
+- name: "Set the prom auth"
+  ansible.builtin.include_role:
+    name: client_side_tests
+    tasks_from: get_prom_info.yml
+  vars:
+    prom_auth_method: token
+  when:
+    - prom_auth_string is not defined
+    - prom_url is not defined
+
 - name: "Get the observability strategy and set observability_api"
   ansible.builtin.include_role:
     name: test_alerts
@@ -18,13 +29,13 @@
             labels:
               prometheus: default
               role: alert-rules
-            name: prometheus-alarm-rules
+            name: fvt-testing-prometheus-alarm-rules-email
             namespace: service-telemetry
           spec:
             groups:
               - name: ./openstack.rules
                 rules:
-                  - alert: Collectd metrics receive rate is zero
+                  - alert: FVT_TESTING Collectd metrics receive rate is zero
                     expr: rate(sg_total_collectd_msg_received_count[1m]) == 0
           EOF
       changed_when: false
@@ -54,6 +65,21 @@
       changed_when: false
 
   always:
+    - name: "Delete the PrometheusRule"
+      ansible.builtin.command: |
+        oc delete prometheusrule.{{ observability_api }} fvt-testing-prometheus-alarm-rules-email
+      register: delete_prom
+      changed_when: delete_prom.rc == 0
+
+    - 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'
+      changed_when: false
+
     - name: "RHELOSP-176046 Remove alertmanagerConfigManifest from the ServiceTelemetry object"
       ansible.builtin.shell:
         cmd: |