Deprecate OpenTofu CI template

Related to components/opentofu#43

data/deprecations/17-1-opentofu-ci-template.yml

+- title: "OpenTofu CI/CD template"
+  # The milestones for the deprecation announcement, and the removal.
+  removal_milestone: "18.0"
+  announcement_milestone: "17.1"
+  # Change breaking_change to false if needed.
+  breaking_change: true
+  # The stage and GitLab username of the person reporting the change,
+  # and a link to the deprecation issue
+  reporter: nagyv-gitlab
+  stage: depoy
+  issue_url: https://gitlab.com/components/opentofu/-/issues/43#note_1913822299
+  impact: low
+  scope: project
+  resolution_role: Maintainer
+  manual_task: true
+  body: |  # (required) Don't change this line.
+    We introduces the OpenTofu CI/CD template in 16.8 as CI/CD components were not available for self-managed installations yet.
+    With the introduction of [GitLab CI/CD components for self-managed users](https://docs.gitlab.com/ee/ci/components/#use-a-gitlabcom-component-in-a-self-managed-instance)
+    we are removing the redundant OpenTofu CI/CD templates in favor of the CI/CD components.
+
+    We introduced the OpenTofu CI/CD template in 16.8 because CI/CD components were not yet available for self-managed instances.
+    With the introduction of [GitLab CI/CD components for self-managed users](https://docs.gitlab.com/ee/ci/components/#use-a-gitlabcom-component-in-a-self-managed-instance),
+    we are removing the redundant OpenTofu CI/CD templates in favor of the [OpenTofu CI/CD component](https://gitlab.com/components/opentofu).
+
+    For information about migrating from the CI/CD template to the component, see the [OpenTofu component documentation](https://gitlab.com/components/opentofu#usage-on-self-managed).
+
+# ==============================
+# OPTIONAL END-OF-SUPPORT FIELDS
+# ==============================
+#
+# If an End of Support period applies:
+# 1) Share this announcement in the `#spt_managers` Support channel in Slack
+# 2) Mention `@gitlab-com/support` in this merge request.
+#
+  # When support for this feature ends, in XX.YY milestone format.
+  end_of_support_milestone:
+  # Array of tiers the feature is currently available to,
+  # like [Free, Silver, Gold, Core, Premium, Ultimate]
+  tiers: Free
+  # Links to documentation and thumbnail image
+  documentation_url: https://gitlab.com/components/opentofu

doc/update/deprecations.md

@@ -323,6 +323,28 @@ Offset-based pagination for the [List registry repository tags](https://docs.git
 
 </div>
 
+<div class="deprecation breaking-change" data-milestone="18.0">
+
+### OpenTofu CI/CD template
+
+<div class="deprecation-notes">
+- Announced in GitLab <span class="milestone">17.1</span>
+- Removal in GitLab <span class="milestone">18.0</span> ([breaking change](https://docs.gitlab.com/ee/update/terminology.html#breaking-change))
+- To discuss this change or learn more, see the [deprecation issue](https://gitlab.com/components/opentofu/-/issues/43#note_1913822299).
+</div>
+
+We introduces the OpenTofu CI/CD template in 16.8 as CI/CD components were not available for self-managed installations yet.
+With the introduction of [GitLab CI/CD components for self-managed users](https://docs.gitlab.com/ee/ci/components/#use-a-gitlabcom-component-in-a-self-managed-instance)
+we are removing the redundant OpenTofu CI/CD templates in favor of the CI/CD components.
+
+We introduced the OpenTofu CI/CD template in 16.8 because CI/CD components were not yet available for self-managed instances.
+With the introduction of [GitLab CI/CD components for self-managed users](https://docs.gitlab.com/ee/ci/components/#use-a-gitlabcom-component-in-a-self-managed-instance),
+we are removing the redundant OpenTofu CI/CD templates in favor of the [OpenTofu CI/CD component](https://gitlab.com/components/opentofu).
+
+For information about migrating from the CI/CD template to the component, see the [OpenTofu component documentation](https://gitlab.com/components/opentofu#usage-on-self-managed).
+
+</div>
+
 <div class="deprecation " data-milestone="18.0">
 
 ### Project page in group settings is deprecated