Run watcher hook at the beginning of kuttl tests

Instead of running at the end of the infra playbook, run it just before
running the tests. This means the watcher operator will be installed
after the openstack-operator is, which will prevent the watcher operator
crashing and having to restart until the openstack-operator is
available.

Depends-On: openstack-k8s-operators/ci-framework#2735

Author: cescgina

.zuul.yaml

@@ -104,10 +104,11 @@
       deploy_watcher_service: false
       # Do not fetch dlrn md5 hash
       fetch_dlrn_hash: false
-      # run the hook to install watcher at the end of the cifmw infra playbook. If we try to run it
+      # run the hook to install watcher at the beginning of the cifmw playbook that runs the
+      # kuttl tests. If we try to run it
       # as a standalone plabyook, it tries to load the cifmw ci_script action
       # plugin from the zuul executor and doesn't find it
-      post_infra:
+      pre_kuttl_from_operator:
         - name: Deploy watcher service
           type: playbook
           source: "{{ watcher_hook }}"