cicd: add manual branch build

.gitlab-ci.yml

@@ -35,8 +35,8 @@ build_branch:
     DOCKER_DRIVER: overlay2
   image: ${CI_DEPENDENCY_PROXY_DIRECT_GROUP_IMAGE_PREFIX}/docker:18.09
   stage: build
+  when: manual
   only:
-    - dev
     - merge_requests
   script:
     - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY