feat: Adds semantic-release dry-run for .releaserc changes

When modifying the .releaserc file it would be nice to see a dry-run
for what will happen when the branch is override.

Brought up in https://gitlab.com/gitlab-com/gl-infra/data-access/durability/gitlab-backup-cli/-/merge_requests/15#note_2356952141

semantic-release.yml

@@ -98,6 +98,28 @@ semantic_release_check:
       changes:
         - .releaserc.json
+semantic_release_dry_run:
+  stage: $[[ inputs.validate_stage ]]
+  needs: []
+  image:
+    name: ${CI_REGISTRY}/gitlab-com/gl-infra/common-ci-tasks-images/semantic-release:latest
+    entrypoint: [""]
+  variables:
+    GITLAB_URL: $CI_SERVER_URL
+  script:
+    - semantic-release --dry-run --branches $CI_MERGE_REQUEST_SOURCE_BRANCH_NAME
+  after_script: |
+    cat <<-EOD
+    ----------------------------------------------------------
+    Need help? Documentation on the semantic_release CI job can be found at:
+    https://gitlab.com/gitlab-com/gl-infra/common-ci-tasks/-/blob/main/semantic-release.md
+    EOD
+  rules:
+    # Don't run when the pipeline was triggered by a schedule
+    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
+      changes:
+        - .releaserc.json
+
 include:
   - local: 'internal/semantic-release/vault.yml'
     rules: