ci: add testing for image_manifest and implement fixes (#321)

Co-authored-by: okozachenko1203 <okozachenko1203@users.noreply.github.com>
diff --git a/roles/image_manifest/tasks/main.yml b/roles/image_manifest/tasks/main.yml
index 843f226..b07c9b7 100644
--- a/roles/image_manifest/tasks/main.yml
+++ b/roles/image_manifest/tasks/main.yml
@@ -13,6 +13,7 @@
 
 - name: Mirror images
   when: image_manifest_mirror
+  changed_when: false
   ansible.builtin.command:
     crane copy {{ atmosphere_images[item] }} {{ image_manifest_data['atmosphere_images'][item] }}
   loop: |