Fix an issue in `ci_run_n_monitor.py` where the token was not
being correctly propagated to the GitlabGQL abstraction. This addresses
misbehavior in scenarios like running pipelines in a private fork,
ensuring proper functionality.
Also document `find_dependencies` function.
Signed-off-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27206>