Fix rotate_app_creds YAML parsing when from_yaml returns a list

The clouds.yaml stored in the OCP secret starts with '---' (from
to_nice_yaml), causing from_yaml to return a list instead of a dict.
Strip the document separator before piping to the secret and handle
both list/dict cases when parsing the verification readback.

OSPRH-6485

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

Author: tusharjadhav3302

collection/stages/roles/day2ops/tasks/procedures/rotate_app_creds.yml

@@ -13,7 +13,7 @@
 - name: Rotate OpenShift Cloud Credentials
   ansible.builtin.shell: |
     set -o pipefail && \
-    cat {{ clouds_yaml_file_path }} | sed 's/{{ user_cloud }}:/openstack:/' | \
+    cat {{ clouds_yaml_file_path }} | sed '/^---$/d' | sed 's/{{ user_cloud }}:/openstack:/' | \
     oc set data -n kube-system secret/openstack-credentials clouds.yaml=-
   environment:
     KUBECONFIG: "{{ kubeconfig }}"
@@ -29,8 +29,10 @@
   changed_when: false
 
 - name: Parse OCP credentials
+  vars:
+    parsed_yaml: "{{ ocp_creds_output.stdout | from_yaml }}"
   ansible.builtin.set_fact:
-    ocp_creds: "{{ ocp_creds_output.stdout | from_yaml }}"
+    ocp_creds: "{{ (parsed_yaml is mapping) | ternary(parsed_yaml, parsed_yaml[0]) }}"
 
 - name: Verify credentials rotated to application credentials
   ansible.builtin.assert: