Changelog: Include all related projects into the changelog

In build-pipeline.yml, enable the new parameter by default.

YT-256

build-pipeline.yml

@@ -239,6 +239,7 @@ workflow:
     - .gitlab-ci/scripts/changelog_generator.py
               --token=${GITBOT_TOKEN}
               --branch=${MASTER_BRANCH}
+              --all-projects
               --project=${CI_PROJECT_PATH}
               ${PROJECT_ARGS}
               > changelog.md