Merge branch 'fix-sles-builds-trigger' into 'master'

Fix SLES failures in build-on-all-os downstream pipeline

See merge request https://gitlab.com/gitlab-org/gitlab-omnibus-builder/-/merge_requests/336

Merged-by: Robert Marshall <rmarshall@gitlab.com>
Approved-by: Robert Marshall <rmarshall@gitlab.com>
Co-authored-by: Balasankar "Balu" C <balasankar@gitlab.com>

.gitlab/ci/qa.gitlab-ci.yml

@@ -6,9 +6,11 @@ include:
   trigger:
     project: 'gitlab-org/build/omnibus-gitlab-mirror'
     strategy: depend
+    branch: 'master'
   variables:
     BUILDER_IMAGE_REGISTRY: "${CI_REGISTRY_IMAGE}/staging"
     PUBLIC_BUILDER_IMAGE_REGISTRY: "${CI_REGISTRY_IMAGE}/staging"
+    DEV_BUILDER_IMAGE_REGISTRY: "dev.gitlab.org:5005/cookbooks/gitlab-omnibus-builder/staging"
     BUILDER_IMAGE_REVISION: "${CI_COMMIT_REF_SLUG}"
   needs:
     - ubuntu_20.04 test