ci: reduce the root .gitlab-ci file

Following the idea to distribute in a tree of files to include and split
between the files with or without hidden job definitions, some jobs in the
root file can be moved to files made specific to describe build or test jobs.

Signed-off-by: Sergi Blanch-Torne <sergi.blanch.torne@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35427>

.gitlab-ci/test/gitlab-ci-inc.yml

@@ -182,3 +182,13 @@
     - (set -x; curl -L --retry 4 -f --retry-all-errors --retry-delay 60 ${FDO_HTTP_CACHE_URI:-}https://${PIPELINE_ARTIFACTS_BASE}/${S3_ARTIFACT_NAME}.tar.zst | tar --zstd -x)
     - section_end artifacts_download
 
+# Jobs that need to pass before spending hardware resources on further testing
+.required-for-hardware-jobs:
+  needs:
+    - job: rustfmt
+      optional: true
+      artifacts: false
+    - job: yaml-toml-shell-py-test
+      optional: true
+      artifacts: false
+

.gitlab-ci/test/gitlab-ci.yml

@@ -1,6 +1,24 @@
 include:
   - local: '.gitlab-ci/test/gitlab-ci-inc.yml'
 
+mr-label-maker-test:
+  extends:
+    - .fdo.ci-fairy
+  stage: sanity
+  tags:
+    - placeholder-job
+  rules:
+    - !reference [.mr-label-maker-rules, rules]
+  variables:
+    GIT_STRATEGY: fetch
+  timeout: 10m
+  script:
+    - set -eu
+    - python3 -m venv .venv
+    - source .venv/bin/activate
+    - pip install git+https://gitlab.freedesktop.org/freedesktop/mr-label-maker
+    - mr-label-maker --dry-run --mr $CI_MERGE_REQUEST_IID
+
 rustfmt:
   extends:
     - .formatting-check