Revert "CI: use common/gitlab-ci.yml file"

This reverts commit 9ddbfd49.

.gitlab-ci.yml

+image: registry.videolan.org/videolan-gitlab-pages:20231201145306
+
+variables:
+  GIT_STRATEGY: clone
+  ROOT_URL: https://docs.videolan.me/vlc-user
+  INSTALLDIR: public
+  GIT_BRANCH: $CI_COMMIT_BRANCH
+
+# Create a global cache to keep other branch and jobs pages
+cache:
+  key: one-cache-to-rule-them-all
+  paths:
+  - public
+
+# generate platform websites
+pages:
+  tags:
+  - pages
+  stage: deploy
+  script: |
+      if [ "$GIT_BRANCH" == "master" ]; then
+          make html VERSION="" PLATFORM=""
+          make root_redirect
+          make platform_redirect PLATFORM=desktop
+          make platform_redirect PLATFORM=android
+          make install
+      else
+          make html LANGUAGE=en
+          make install
+      fi
+  artifacts:
+    paths:
+    - public
+  only:
+    - desktop/3.0
+    - android/3.5
+    - master
+