CI: Enable merge result pipelines and merge trains for the extension
Every now and then, we've got broken main
(like today) because we it's possible to merge MR that is slightly out of date. This merge then might fail compilation or linting.
Solution
Enable merge result pipelines and merge trains for the extension.
Complication
We need to change the commit-lint to allow "Merge" commit messages (e.g. Merge branch 'renovate/unit-testing' into 'main'
). They would currently fail the conventional commit linting.