Add flag to prevent running helm update (#10169)

Signed-off-by: Pat Riehecky <riehecky@fnal.gov>

roles/helm-apps/tasks/main.yml

@@ -10,7 +10,9 @@
     release_name: dummy  # trick needed to refresh in separate step
     release_namespace: kube-system
     update_repo_cache: true
-  when: repositories != []
+  when:
+    - repositories != []
+    - helm_update
 
 - name: Install Helm Applications
   kubernetes.core.helm: "{{ helm_defaults | combine(release_common_opts, item) }}"

roles/helm-apps/vars/main.yml

 ---
+helm_update: true
+
 helm_defaults:
   atomic: true
   binary_path: "{{ bin_dir }}/helm"