[ci] Automatically create GitLab release.

.gitlab-ci.yml

@@ -60,3 +60,4 @@ include:
   - local: '/scripts/ci/jobs/clang-tidy.yml'
   - local: '/scripts/ci/jobs/web.yml'
   - local: '/scripts/ci/jobs/container.yml'
+  - local: '/scripts/ci/jobs/release.yml'

scripts/ci/jobs/release.yml

+release:
+  stage: package
+  image: registry.gitlab.com/gitlab-org/release-cli:latest
+  rules:
+    - if: $CI_COMMIT_TAG
+  script:
+    - echo 'Running release job.'
+  release:
+    tag_name: '$CI_COMMIT_TAG'
+    description: 'Created using the GitLab release-cli.'