ci: Make check-commit-log run again

It needs 'only: merge_request' to get the necessary env variables.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1567>

.gitlab-ci.yml

@@ -6,6 +6,11 @@ stages:
  - test
  - coverage
 
+.only_default: &only_default
+  only:
+      - merge_requests
+      - /^.*$/
+
 check-commit-log:
   stage: review
   variables:
@@ -18,6 +23,7 @@ check-commit-log:
       - commit-message-junit-report.xml
     reports:
       junit: commit-message-junit-report.xml
+  <<: *only_default
 
 build-mutter:
   stage: build
@@ -30,6 +36,7 @@ build-mutter:
     expire_in: 1 day
     paths:
       - build
+  <<: *only_default
 
 build-without-opengl-and-glx:
   stage: build
@@ -41,6 +48,7 @@ build-without-opengl-and-glx:
   artifacts:
     paths:
       - build/meson-logs
+  <<: *only_default
 
 build-without-native-backend-and-wayland:
   stage: build
@@ -52,6 +60,7 @@ build-without-native-backend-and-wayland:
   artifacts:
     paths:
       - build/meson-logs
+  <<: *only_default
 
 test-mutter:
   stage: test
@@ -74,6 +83,7 @@ test-mutter:
     when: always
     paths:
       - build
+  <<: *only_default
 
 test-mutter-coverage:
   stage: coverage
@@ -88,6 +98,7 @@ test-mutter-coverage:
       - build/meson-logs/coveragereport
   coverage: '/^TOTAL.*\s+(\d+\%)$/'
   when: always
+  <<: *only_default
 
 can-build-gnome-shell:
   stage: test
@@ -100,3 +111,4 @@ can-build-gnome-shell:
     - .gitlab-ci/checkout-gnome-shell.sh
     - meson gnome-shell gnome-shell/build --prefix /usr -Dman=false
     - ninja -C gnome-shell/build install
+  <<: *only_default