ci: Guard pipeline on review stage

The first step is now review, as they use the tiny ci-fairy image, not
our custom ones, so the guards should be on those, not the build step.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1588>

.gitlab-ci.yml

@@ -66,16 +66,6 @@ workflow:
     - if: '$CI_COMMIT_BRANCH =~ /^gnome-[0-9-]+$/'
     - when: 'manual'
 
-build-fedora-container:
-  extends:
-    - .fdo.container-build@fedora@x86_64
-    - .mutter.fedora:33
-  stage: prepare
-  needs:
-    - check-commit-log
-    - check-merge-request
-  &pipline-guard
-
 check-commit-log:
   extends:
     - .fdo.ci-fairy
@@ -90,6 +80,7 @@ check-commit-log:
       - commit-message-junit-report.xml
     reports:
       junit: commit-message-junit-report.xml
+  <<: *pipline-guard
 
 check-merge-request:
   extends:
@@ -108,6 +99,16 @@ check-merge-request:
       - check-merge-request-report.xml
     reports:
       junit: check-merge-request-report.xml
+  <<: *pipline-guard
+
+build-fedora-container:
+  extends:
+    - .fdo.container-build@fedora@x86_64
+    - .mutter.fedora:33
+  stage: prepare
+  needs:
+    - check-commit-log
+    - check-merge-request
 
 build-mutter:
   extends: