Address review: clarify stages header and guard pull-secret cleanup

Require a defined preexistence check before deleting pull-secret.json
so an early release_name failure cannot wipe a pre-populated secret.

Co-authored-by: Cursor <cursoragent@cursor.com>
Change-Id: Ie19b52766d0d3d6bcc0053caf3310befd57ee57c

Author: imatza-rh

collection/tools/roles/tools_get_openshift_release/tasks/get_openshift_release_binaries.yml

@@ -189,7 +189,9 @@
 
   always:
     - name: Remove pull secret file
-      when: _pull_secret_preexists.stat.size | default(0) == 0
+      when:
+        - _pull_secret_preexists is defined
+        - _pull_secret_preexists.stat.size | default(0) == 0
       ansible.builtin.file:
         path: "{{ pull_secret_file }}"
         state: absent

jobs_definitions/adoption_verification.yaml

@@ -3,8 +3,8 @@
 #     * ADOPTION VERIFICATION *
 #
 # - Post-adoption verification of the shiftstack cluster.
-# - Runs only the verification stage to confirm the OCP-on-OSP
-#   cluster is functional after adoption from OSP 17.1 to RHOSO 18.
+# - Runs the verification and openstack_test stages to confirm the
+#   OCP-on-OSP cluster is functional after adoption from OSP 17.1 to RHOSO 18.
 # - Skips prepare/install/post since the cluster already exists.
 #