[gitlab] trigger operator release candidate workflow (#1446)

* test deploy flow

* fix workflow

* cleanup

.gitlab-ci.yml

@@ -509,3 +509,28 @@ publish_nightly_workflow:
     TARGET_ENV: $TARGET_ENV
     CONDUCTOR_TARGET: $CONDUCTOR_TARGET
     DDR_WORKFLOW_ID: $DDR_WORKFLOW_ID
+
+# On success, this will cause CNAB to trigger a Deployment to Release Candidate clusters
+publish_release_candidate_workflow:
+  stage: deploy
+  rules:
+    - if: '$CI_COMMIT_BRANCH == "main" && $CI_COMMIT_TAG'
+      when: manual # TODO: change this to on_success when feeling confident
+    - when: never
+  needs:
+    - trigger_internal_operator_image
+    - trigger_internal_operator_check_image
+  trigger:
+    project: DataDog/k8s-datadog-agent-ops
+    branch: main
+    strategy: depend
+    forward:
+      pipeline_variables: true
+  variables:
+    OPERATOR_RC: "true"
+    SKIP_PLAN_CHECK: "true"
+    ENVIRONMENTS: "experimental"
+    CHART: "datadog-operator"
+    OPTION_AUTOMATIC_ROLLOUT: "true"
+    EXPLICIT_WORKFLOWS: "//workflows:deploy_operator_rc.operator_rc"
+    OPERATOR_IMAGE_TAG: $CI_COMMIT_REF_SLUG