Integrate gitlab-ci/remove-distro-images

--

Commit: seco-ne/yocto/infrastructure/gitlab-ci@a731b156

Remove DISTRO_IMAGES

This variable has been removed in Yocto. Its contents have been merged
into DISTRO_RELEASE_ARTEFACTS.

See for reference:
meta-seconorth-distro@a316e95e

.gitlab-ci @ a731b156

-Subproject commit 45f2aca73b8c48f0c456030d884c7d4c0c4deda0
+Subproject commit a731b1569292fc3742fa16fc2328524ea2a93f9f

.gitlab-ci.yml

@@ -4,8 +4,8 @@
 # ---------------------------------------------------------------------------------------
 include:
   - project: '${CI_PROJECT_ROOT_NAMESPACE}/yocto/infrastructure/gitlab-ci'
-    ref: 45f2aca73b8c48f0c456030d884c7d4c0c4deda0
+    ref: a731b1569292fc3742fa16fc2328524ea2a93f9f
     file: 'manifest-integration.yml'
 
 variables:
-  GITLAB_CI_REVISION: 45f2aca73b8c48f0c456030d884c7d4c0c4deda0
+  GITLAB_CI_REVISION: a731b1569292fc3742fa16fc2328524ea2a93f9f