BUILD/MINOR: ci: add ci job for asking backport

Author: oktalz

.gitlab-ci.yml

@@ -4,12 +4,25 @@ variables:
   GO_VERSION: "1.24"
   DOCKER_VERSION: "26.0"
 stages:
+  - bots
   - check-commit
   - generate
   - build
   - lint
   - test
   - e2e
+mr-backport-question:
+  stage: bots
+  needs: []
+  image:
+    name: $CI_REGISTRY_GO/docker:$DOCKER_VERSION-go$GO_VERSION
+    entrypoint: [""]
+  rules:
+    - if: $CI_PIPELINE_SOURCE == 'merge_request_event' && $CI_MERGE_REQUEST_TARGET_BRANCH_NAME == $CI_DEFAULT_BRANCH
+  tags:
+    - go
+  script:
+    - go run cmd/gitlab-mr-checker/main.go
 build-specification:
   stage: build
   needs: []