There's a different way to list the files between the former pre-commit
hook (which ran gst-indent directly on the output of git diff-index)
and the former CI check job (which ran gst-indent-all wholesale).
It can be easily addressed by detecting CI_PROJECT_NAME at listing time.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8409>