CI: deploy_gitlab_ci: Fix merge, integration branch was used after delete

deploy_gitlab_ci.py

@@ -250,6 +250,9 @@ def main():
             )
             # if this has rebased the integration commit needs to be adapted:
             project_integration[p]["commit"] = integration_commit
+            # Save the target branch here, as the source branch gets deleted
+            # during merge
+            project_integration[p]["branch"] = mr.target_branch
 
             if not merged:
                 sys.exit(
@@ -298,6 +301,7 @@ def main():
         # get BB_RECIPE_NAME from the projects .gitlab-ci.yml
         # Use direct read from gitlab as we have not checked out
         # the repo if the branch is already up to date
+
         gitlab_ci_yml = common.get_repository_file_raw(
             integration["project"], ".gitlab-ci.yml", ref=integration["branch"]
         )